Yikes!
Can you lift the body in the middle of the car with a floor jack and a bit of wood to the point where the body is back in the correct position (doors / door jams)?
I'd think that something is seriously rusted through if they can bend the body like that unless it fell off the lift, but what do I know... If, by lifting it with the floor jack can get the body back in position, get everything up on jack stands, level everything out (per the frame alignment manual) and do a bit of reinforcing.
Just my thoughts. YMMV.
