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.
URL that you provided is not working and seems that your website is not working because some DNS problem.
Regarding to JotForm forms, you can make them responsive by adding Mobile responsive widget inside of your form. You can add it inside of your Form Builder. Just drag and drop him inside of you form.
Hope this will help. Let us know if you need further assistance.