dang, that sux big time. The only right move here is to get lawyer, and do not try to do anything on your own .. unless you know what you're doing.

I had a hit and run accident some time ago, ended up with them buying my car for more than what it was worth, and giving me extra on top of what they already paid for my medical bills. But it took over 1 year.

good luck though, and hope you heal fast