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.
My colleague has already answered this inquiry a week ago. Here's the thread: http://www.jotform.com/answers/611697-How-to-cancel-my-subscription#1.
Again, the subscription is already cancelled, but you are still on the Premium plan because your last payment is not yet expired and it's up until July 30th. Your account will be automatically downgraded to the free plan after this date.