Unreliable and possible fraud

My wentnn no in time,…damaged bumper and surroundings had to be repaired…got my car back, gearbox totally broken, damage about 60 grand. They don‘t care, first they tried to blame it on the accident, which didn‘t work. Then they tried to blame it on wear and tear…why was there wear and tear during the time the car was in their possession? The moment i drove of their premises , there was a problem…car went in to diagnosis to Audi, and of course it was not accident related, which I never claimed! The gearbox was damaged while the car was at ABW, so ABE is reliable! Additional, when the car came back from diagnostic, the drivers door didn‘t react on the remotes anymore to lock and unlock…all other doors are fine This is the worst bodysuit in SA, don‘t go there at all…reception already so unfriendly…just run! They damage your car, heard of driving tank empty or syphoning fuel out of your tank, I even believe the use your car for spares