Unable to change credit card on billing page

This is not helpful. Is there a customer service number or chat?

We do not have phone support. We have chat support, but it is not always available. The best way to reach us is here on the forum or via email at support@jotform.com. 

Are you unable to update the credit card on the Billing page? I checked and your account is on the Free plan, so it does not have a possibility to update the credit card. I saw that your account is a sub-user account, of the account weblead, which has a Bronze subscription. If you want to update the credit card, you need to do it on the account weblead.