I have two payment cards added, one I want to remove

if you have a teams or enterprise subscription, open the support tab on your admin console > start chat or start case or request expert session. https://helpx.adobe.com/enterprise/using/support-and-expert-services.html

You should contact Adobe support, they rarely answer to queries on these forums. If you are an Enterprise customer then you can contact support via the Admin console. For individual subscription follow the instructions given below.
1. Go to https://helpx.adobe.com/contact.html?rghtup=autoOpen
2. Wait a bit on the page that opens up, it should automatically open a chat popup. If that does not happen then look for a call out/chat icon at the bottom right, click over it and the chat popup should open
3. In order to talk to a human type "AGENT" in the chat box
4. If you are not able to get to the chat window, then disable your adblockers, firewall, enable cookies/scripts on your browser. If it still fails then change your browser/machine/network.

P.S. Be mindful of answering anyone who sends you a private message. See the following for more information about scammers
https://tinyurl.com/y7cfrr7y
-Manan