You can reset your payment PIN code by following the steps below.
1. Tap the three lines at the top right of the app
2. Tap [Change payment PIN code] under [Account management]
3. Tap [Change] for [Payment code]
4. Tap [Click here if you have forgotten your current payment PIN code]
5. Tap [Send SMS]. A verification code will be sent to the registered phone number.
6.Enter the authentication code you received and tap [Authenticate]
7. Enter the new payment PIN code (6 digits) and tap [Register]
8. When the message "Password change complete" is displayed, the resetting is complete.