Changing Source of Payment

I want to change the credit card i use for paying Ankihub. I could not find it in the membership portal. What am i supposed to do?

This question was answered here:

hi. link doesnโ€™t seem to work. how can I add another credit card?

Apologies, here is the updated link โ“ FAQ - AnkiHub

link is not working, can you help me?
it says Oops! That page doesnโ€™t exist or is private.

This is the updated post: How do I modify my billing details?