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 could not find in your forms one of them integrated with PayPal; however, I would suggest you to enable the IPN option in your PayPal account, so you get notified each time you get a payment: How-to-Enable-IPN-for-Paypal
I would also suggest you to enable the Incomplete Payment Option since when there is an incomplete payment in your form emails do not send, but enabling this option you will receive them: How-to-Setup-Incomplete-Payment-Notification-E-Mail
Also, you should check your email address in our bounce list, if the email address is in our bounce list you will not receive emails: How-to-Remove-Your-Email-Address-from-Bounce-List
If you're still not receiving emails, pelase provide us the link to your form so we can check it.