What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
Unfortunately, we don't have any phone support but we can still help you via forum. About changing credit card it would be best if you fully cancel your existing subscription then re-subscribe under http://www.jotform.com/myaccount/billing using your new credit card then let us know once you have fully cancelled and renewed your subscription so that we can verify if the subscription was cancelled from our end to avoid duplicate charge.