How to I recuperate the submissions?

I accidentally deleted the submissions and I want to know how to get them back

Unfortunately, once a submission is deleted it is completely removed from our system and cannot be recovered.  The only log of the submissions that may still be available would be your email history if you had email notifications set up:

https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History