If i accidentally deleted submissions but need to see them can i get them back?

Unfortunately, it is not possible to restore deleted submissions. 

I would suggest you to backup your data by downloading them to your computer before deleting the submissions. 

How to Download Form Submissions as Excel/CSV/PDF

If you already deleted your submissions but you did no back your data, then I can only suggest you to check the emails that you received when your form was submitted and try to find data there. You can also check the email logs on your account:

How to View All Your Form Email History