Following step by step of this guide, we'll process your payment and cancel the old subscription automatically.
Currently, it's not possible to update your credit card information on the Back4App Dashboard, the process to update is purchasing the plan again and insert your app ID before clicking on the "submit" button.
You can get the link to your plan on our Pricing Page.
However, if you have a tailor-made plan, you can email us at email@example.com with your app ID, and we'll email you back with the link. (: