Meetup doesn't allow users to remove credit card

Meetup doesn't allow the users to remove their credit card.

I was once an organizer of a group, so I added my credit card to pay for the subscription. Now, I want to remove the credit card, but as per my e-mail conversation with the Meetup support team, I can't remove my credit card from their frontend. As per the email, they, however, have removed my card from their third-party payment processor.