1991 Toyota Camry body & structure problems

I was traveling toward kokomo, indiana, returning home from a dr's appointment with my service dog, gamsby. There was a harley_davidson trailer truck with a michigan license plate in front of me. A large metal l shaped bar flew from under the trailer and under my car, sending it into a spin and tearing up the bottom of the car. My car is no longer operational for trips out of town. I tried to talk with the harley davidson company and they claimed no responsibility.

One rear passenger side door hinge has broken away from frame, and second hinge is cracked at frame attachment point. Previous to breaking away, this door hinge has always opened stiffly. Door is now only held on by cracked fringe and latch mechanism and rattles during movement. *nlm