How can i get back images from deleted emails, or ipad ?

a co-worker sent me some images of a new landscape for our next project, i sent them to my hotmail email and erased them off my phone because they where confidential, when i had stored them in my ipad which only i carry around and is locked i also deleted them from my email address. My ipad got messed up and when i got it fixed it and it came with the new software, but ....no images or videos etc what so ever....please help
note: the hotmail action to retrieve deleted emails doesn't work for me because it only retrieves resent emails and this was a year ago , the last place i had the was on my ipad before it got messed up