JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I see that your subscription is being paid by using Stripe. The credit card information of your credit card can be updated from the billing section in your account.
Please click on Change Credit card button to display a pop-up for updating the credit card.
Hope this information helps!