Help remove my old card

Some people have had to contact iTunes Support. Either use the form or scroll to the bottom of the page in the 2nd link. Follow through the screens to get a chat or telephone option.  You may need to pick a problem that is slightly different than yours to get a chat option.  

iTunes Support

iTunes Support – world wide

View, change, or cancel your subscriptions - "Learn how to view your subscriptions that renew automatically,

https://support.apple.com/HT202039