You can review the saved payment methods attached to your MobileTopup account in the app settings.
- Sign in to the MobileTopup app.
- Open Profile, then Settings.
- Select Saved payment methods.
- Select a saved card and choose Remove, then confirm.
Removing a payment method only stops it from being offered for future purchases. It does not cancel an order that is already being processed. If you do not recognise a card charge, see I see a charge from omise*mobiletopup.com that I did not make.