Totally *********** service department

My 2012 Audi Q5 with 68000km has been in for various repairs since 20/12/2014. After a staggering R88000,00 warranty repair bill, I eventually received my vehicle, BS50HYGP, back 2 weeks ago on a Friday, only to have to return it back to them the following Monday, with the following problems, Turbo whistle, auto start stop not functioning, clutch taking too high, engine warning light and coil light on, KNOCK ON LEFT FRONT SUSPENSION WHEN GOING OVER SPEED BUMPS. Audi centre Sandton kept my car for a further 2 weeks to rectify the above faults. I received my car back yesterday, Guess what? There is still a knock on left front suspension when going over speed bumps! Audi center Sandton's excuse, I'm sorry Mr Guerini, we had 2 technicians driving your car and they couldn't hear the knock. My response, Perhaps your technicians need to go for an irrigation of the ears, because you would need to be totally deaf not to hear the knock. Now waiting for technicians to go for a test drive with me so I can let them hear the knock. So the saga continues, almost 2 months later!!! pathetic!