If we have more than 100 submissions, how do we get the rest of the submissions?

Currently we are on the free plan that jot form provides us. It allows 100 submissions per month, but we're not sure if we might go over this allowed amount. If we do by chance go over this amount is there still a way to receive the other submissions? Do we have to pay for the submissions if we go over 100? Were not sure how it works so if you could provide us with some explanation. Thank you! 

Hi,

If you go over the allowed amount and do not upgrade within a day or two, your forms will no longer accept submissions.  Users will be presented with an over quota error when trying to submit the form.  

The forms would be reactivated when limits reset on the first day of the next month or when the account is upgraded.  You will be notified when you are close to your limits and allowed some time to be over them before the forms are disabled.