Jono. Taking a quick peek around. Other folks have had the issue before as well. BOTH, 360 users and PC users have lost saves to updates to which they can never get back.
I was, a bit scatter fucked in the head and thought for some reason that you were disconnected from LIVE for a time which can contribute to blank slates in games when loaded up. But obviously a disk drive wouldn't cause that.
So. I do apologize. If it helps, the first place I ever set up got fucked over as well. And, if I had to flip a coin on it I might bet that if I loaded it up I might lose it as well.
Sorry man.
Yeah, like I said before I tried everything there is that I can do and nothing worked