Change my bank details

° If you made your purchase in the mobile application, you will be billed by your Play Store for an Android mobile, and Apple Store for an iOS mobile.
You must therefore enter your new payment details in your Play Store or Apple Store account settings.

° If you made your purchase on the website, you can change your credit card directly from the "Billing" tab in "My Account".
https://web.onoff.app/settings/billing