Hey, sorry to hear about the loss. Cant you contact the police or something? Stupid people like them deserve to be shot.. but at least getting them behind bars would be better than nothing.
Even though right now, it looks totally bad, and all of your money and time so far have been wasted, just remember, a car can be replaced. At least they didnt go after you. But I still say you go to the cops or something, cuz they cant just do that. And that should at least pay for the damages.
Keep your head up, and it'll all work out.