Today my game crashed while I was playing, Not too sure how. After rebooting, everything was normal and i went to play again. I left the game open and left the room for a while and I when came back to my computer, it was restarted. I thought nothing much of it but when I went back into the game, my level 178 character had been deleted and my alt character was the only one left. 

Is there any way to restore characters? I don't want to end up quitting due to this bug, I had a lot of hours put into that character.