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 checked your website but I can't view it on my end, this is how it looks like:
Have you tried embedding the form using the iFrame embed code? It is also possible that you might need to adjust the actual responsive settings or styling in your Zara.
To make the JotForm forms mobile responsive, you can check this guide: https://www.jotform.com/help/322-How-to-make-mobile-friendly-forms-on-JotForm
I hope that helps.