Extremely bad client service

My insurance company sent my vehicle to Silver Lakes Auto Clinic after I was in an accident and 4 weeks later I received a call to say I can fetch my car as they are done with the repairs. I then take an Uber as I didn't have any transport to the amount of R 150. I get there to be told my car is not ready and will only be ready for collection the next day and they just shrug off their mistake. I go back the next day, collect my car (only the receptionist was there as it was just before their closing time) but on my way home I start noticing all the damages on the inside of my vehicle that were caused by the accident that weren't repaired. I lodged a complaint to my insurance company and they contacted Silver Lakes Auto to reassess and repair my car. So I drive all the way there this morning, I met with the person that worked on my car and a supervisor and when I started pointing out the damages the supervisor asks me if I'm joking and as I try to explain that these are all damages caused by the accident he got more aggressive, rude and raised his voice as he was "talking" to me. He treated me like absolute ******* and barely gave me a chance to speak. After he was done shouting at me and my partner they just turned around and went into the building. I am so shocked that anyone would treat a client in this manner and all the while we were calmly trying to explain what the problem was and how my insurance company instructed us that this was the process to follow. If this person had just explained his issue with my complaint, regarding the damages to my vehicle that we're not repaired, in a calm and non-aggressive manner I would have nothing to complain about here. I would never advise anyone to make use of this place, you will be disappointed and treated terribly.