Numerous form submission of the same form

I keep receiving submissions of the same person's form over and over.  It's been going on for about 16 hours.  How do I make this stop?  

I have checked your form and I can see the submissions; however, I have just tested your form and I can see only one submission was generated. 

Is your form embedded on any webpage? 

This may be also happening due to a cache issue, the form may be reloaded from the browser history. You could also set up unique submissions on your form and avoid to get multiple records from the same user: https://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form 

Do let us know how it goes. 

I will look into that. Thank you!
My other issue is that it now says I have to upgrade my account due to
going over the limit. Is there any way that can be fixed? I typically
wouldn't use more than probably 30 a month so I'm not really wanting to
upgrade.

@barbkarel

I created a separate thread for your other issue so that we can assist you properly. Please wait for our reply on this thread: https://www.jotform.com/answers/1137922.

Thank you.