It's a painful experience to find yourself fixing things,that caused by external company with no accountability

My car came for front left fender,bumper corner and headlight replacement cause by accident , upon collection my battery was swapped/****** ,suddenly the car has no power,the is an epc light on cluster after diagnosis they said throttle body is damaged and I was referred to the insurance which also couldn't clarify the cause after investigation on my complain ,so I would advise anyone who would be referred to that car body shop to be careful,because I'm in the process of taking my car to vw for diagnosis and repairs