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.
I think you're referring to the "Powered by JotForm" displayed at the very bottom of your form, once you have upgraded you can remove this by going to your account settings and un-checking the option to show it:
However, seems like you were able to disable it since this text is not showing anymore in your forms, but if you still need help do not hesitate to let us know, we will be glad to help you.