Why am I stuck even though I tried the sleep/wake up button, and won't connect to Itunes?

I had and accident where it was in an erase process and then got stuck on a loading screen after a few hours. I have tried to do the sleep/wake up aka Reset Mode and continued to repeat I tried recovery with itunes but won't connect and I can't do anything. I appreciate an answer for this question because I tried many ways but won't work.