Complaint about bad service and victimisation.

I took in my car for repair at Audi eastrand mall on the 1st of July 2015. The service advisor never bothered to keep me updated with regarding the problem of my vehicle and the quotation. I had to be the one contacting them and he would ignore my calls or hang up on me. He then told me my car would be ready on Friday the 3rd of July 2015 only to find the car not ready on my arrival there. I was then asked to come back on the next day and I received a call that my car had another problem that had nothing to do with the inial problem that I took it in for. The same service advisor admitted to me that it was their fault that my car was experiencing another problem and he asked me to come on Monday the 6th July 2015 on which I did not receive a call to confirm that I could pick it up. I then laid a complaint on the 7th of July 2015 with Audi south Africa regarding the matter and the service advisor became very rude and unprofessional with me due to my complaint. My car is still with them and I'm now being told about ridiculous amounts for my quotation and extra problems that they claim to have found on my car which are also not related to what they had initially told me. I really n