Annual payment
If you signed up as an annual payer and would like to change your card details on file then please login into your Marshmallow App and go to Manage Payments.
Click 'Edit' under Payment Method and then fill out your new card details. Hit Update saved card and you're all set.
Monthly Instalments
If you pay via repeat card charge, you can update your saved card through the Marshmallow app:
Open the Marshmallow app and tap on Manage policy
Scroll to Manage your payments
Scroll to your payment method and tap Edit
Add your new debit or credit card details, hit Update saved card and you're all set! Your remaining monthly instalments will be charged on that card.