diff --git a/src/Quiz/quiz.schema.ts b/src/Quiz/quiz.schema.ts
index 1f2d902..13e71e2 100644
--- a/src/Quiz/quiz.schema.ts
+++ b/src/Quiz/quiz.schema.ts
@@ -212,7 +212,6 @@ export class QuizSchema extends PothosSchema {
               'centerMentorId',
               'createdAt',
               'updatedAt',
-              'service',
             ]),
             required: true,
           }),
diff --git a/src/RefundTicket/refundticket.schema.ts b/src/RefundTicket/refundticket.schema.ts
index 5c1abcd..584ca43 100644
--- a/src/RefundTicket/refundticket.schema.ts
+++ b/src/RefundTicket/refundticket.schema.ts
@@ -122,14 +122,20 @@ export class RefundTicketSchema extends PothosSchema {
           if (ctx.isSubscription) {
             throw new Error('Subscription is not allowed')
           }
-          if (ctx.http.me?.role !== Role.CUSTOMER) {
-            throw new Error('Only customers can request refund')
+          
+          // Check if the user is a customer or a center mentor
+          if (ctx.http.me?.role !== Role.CUSTOMER && ctx.http.me?.role !== Role.CENTER_MENTOR) {
+            throw new Error('Only customers and center mentors can request refund')
           }
-          // check if bank bin and bank account number is exists else throw error
-          if (!ctx.http.me?.bankBin || !ctx.http.me?.bankAccountNumber) {
-            throw new Error('Bank bin and bank account number are required, please update your profile first')
+
+          // Check bank details for non-center mentors
+          if (ctx.http.me?.role !== Role.CENTER_MENTOR) {
+            if (!ctx.http.me?.bankBin || !ctx.http.me?.bankAccountNumber) {
+              throw new Error('Bank bin and bank account number are required, please update your profile first')
+            }
           }
-          // check if order exists
+
+          // Check if order exists
           const order = await this.prisma.order.findUnique({
             where: { id: args.orderId },
             include: {
@@ -139,49 +145,78 @@ export class RefundTicketSchema extends PothosSchema {
           if (!order) {
             throw new Error('Order not found')
           }
-          // check if order status is PAID
+
+          // Check if order status is PAID
           if (order.status !== OrderStatus.PAID) {
             throw new Error('Order is not paid')
           }
-          // check if order total is not null
+
+          // Check if order total is not null
           if (!order.total || order.total === 0) {
             throw new Error('Order total is null or free')
           }
+
           if (order.refundTicket) {
             throw new Error('Refund ticket already exists')
           }
-          // calculate refund amount based on order time: if order is less than 24 hours, refund 100%, if more than 24 hours, less than 48 hours, refund 50%, if more than 72 hours, cannot refund
+
+          // Calculate refund amount based on order time
           const now = DateTimeUtils.now()
           const orderDate = DateTimeUtils.fromDate(order.createdAt)
           const diffTime = Math.abs(now.diff(orderDate).toMillis())
           const diffDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24))
+          
           let refundAmount = 0
-          if (diffDays < 1) {
+          
+          // Special handling for center mentors - full refund always allowed
+          if (ctx.http.me?.role === Role.CENTER_MENTOR) {
             refundAmount = order.total
-          } else if (diffDays < 3) {
-            refundAmount = order.total * 0.5
+          } else {
+            // Existing refund logic for customers
+            if (diffDays < 1) {
+              refundAmount = order.total
+            } else if (diffDays < 3) {
+              refundAmount = order.total * 0.5
+            }
           }
+
           if (refundAmount === 0) {
             throw new Error('Cannot refund after 3 days')
           }
-          // create refund ticket
-          // get bank name from bank bin from banks.json
-          // biome-ignore lint/suspicious/noExplicitAny: <explanation>
-          const bank = banks.data.find((bank: any) => bank.bin === ctx.http.me?.bankBin)
-          if (!bank) {
-            throw new Error('Bank not found')
+
+          // Prepare bank details
+          let bankBin = ctx.http.me?.bankBin
+          let bankAccountNumber = ctx.http.me?.bankAccountNumber
+          let bankName = ''
+
+          // For center mentors, use a default or system bank account
+          if (ctx.http.me?.role === Role.CENTER_MENTOR) {
+            // You might want to replace this with a specific system bank account
+            bankBin = 'SYSTEM_MENTOR_REFUND'
+            bankAccountNumber = 'SYSTEM_MENTOR_ACCOUNT'
+            bankName = 'Center Mentor Refund Account'
+          } else {
+            // Existing bank lookup for customers
+            const bank = banks.data.find((bank: any) => bank.bin === bankBin)
+            if (!bank) {
+              throw new Error('Bank not found')
+            }
+            bankName = bank.name
           }
+
+          // Create refund ticket
           const refundTicket = await this.prisma.refundTicket.create({
             data: {
               orderId: order.id,
               status: RefundTicketStatus.PENDING,
               amount: refundAmount,
               reason: args.reason,
-              bankBin: ctx.http.me?.bankBin,
-              bankAccountNumber: ctx.http.me?.bankAccountNumber,
-              bankName: bank.name,
+              bankBin: bankBin,
+              bankAccountNumber: bankAccountNumber,
+              bankName: bankName,
             },
           })
+          
           return refundTicket
         },
       }),