Car returned with new damage

I took my car to Renew it Greenstone for cosmetic front end repairs after a fender bender. nothing major just bonnet repair and new grille. The problems started 20 days later, according to my online status and advisor in charge of repairs the car should have been done by then. I had to return my loan car as the loan period had expired. when I called to find out the status of the car I am told it would take another week, how when it was in quality control. after persistently calling I'm informed my front fog light was damaged and would need to be replaced which nobody bothered to inform me about. I reluctantly concede and wait another week. After a week with no feedback i call and am told I can come collect the car the following day. I arrive at the Greenstone Renew it...... I am then told my car is not there, same car which I dropped off at Greenstone is now at Edenvale which nobody bothered to inform me about when I was told to come collect. Fast forward to collecting the car at Edenvale Im 3rd in line and it takes an hour to be assisted after complaints from all the customers. I then am told my car is waiting outside. Things just go downhill from here.. the guy who drives my car out gets out and says my car is misfiring and has a serious engine problem. "when was the last time you took your car for service" were his exact words. This is the same car that has a full service history from Audi and was in serviced about a month prior with no problems detected. Then as I walk around the car the driver side door has a big scratch running the length of the door and a deep paint chips and scratches running to the back. the passenger side has a couple too. these are scratches which were not there on drop off. I then called the lady who was assisting me, she acknowledged the scratches then sent the car back so they could buff it. She then said I could bring the car back for them to fix the deep paint chips. When I attempted to drive the car it had warning lights scattered on the dashboard like a Christmas tree and refused to pull away. All of this happened on Tuesday, 21 November 2017. Today is Friday, 24 November 2017 and till today, no one from Renew it has bothered to take responsibility nor call me regarding my car.