The submissions of my form have accidentally been deleted.

The submissions of my form have accidentally been deleted.

The form still exists, also in excel, but I can't view the pictures, which are extremly important.

Is there any way to restore these?

I'm afraid there is nothing we can do. Once you delete your submissions they are gone. 

Can you supply the form URL in question

Where to Find My Form URL?

Maybe we can escalate the thread to Level 2 support. And see if they have a solution.

What do you exactly mean by level 2 thread support?
The forms contain receipts which are extremely important for our tax declarations.

If there is anything you can do please let me know. 

Unfortunately it is not possible to restore deleted submissions. Please note that once submission is deleted, it is completely deleted from our system along with the uploaded file as well.

If you want to see the submission data, the only option available is to check your account email logs. The following guide should help you how to check your email history:  https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History

Thankyou for your reply.

To prevent cases like this form happening in the future, is there any way to save the pictures in excel as actual pictures, and not as an URL to the jotform?

Unfortunately no but you can integrate your form with google drive or Dropbox account which will send a copy of all uploads to your integrated folder. The following guides should help you:

https://www.jotform.com/help/77-Upload-to-Dropbox-with-JotForm

https://www.jotform.com/help/192-How-to-Integrate-a-Form-with-Google-Drive

Hope this helps.

Do get back to us if you have any questions.