17 week horror service from Mayfair

After 17 weeks, this is by far the worst service I have ever experienced in my life. Written instructions were given to Mayfair to fix my original auto transmission before the car was booked in, this was ignored and a reman transmission was put in my car after 4 weeks, went for a test drive after 4 weeks with the manager, my car was worse off, gearbox whined, kept shuddering and shift flaring. I was told this is normal for these type of transmissions. I informed them that I wanted my original transmission back in my car. After 8 weeks they informed me that my original transmission was back into my car and my car was fixed, I asked them they must send me the serial number on my transmission in my car. Minutes later the general manager e-mailed me to explain that the reman unit was still in my car and they still can't get it 100%, but I can drive the car in the meantime for the next 4 weeks, while they are rebuilding my original transmission from scratch. When I collected my car after 8 weeks the 80 litre tank that was full when handed over to them was empty, I was told it was for adaption purposes, the airbox housing was broken, the engine covers were badly scratched, there where grease finger marks all over my car's beige interior, tow bar plate was bent, brake plate was catching making a horrible screeching sound, my car was scratched all over the bonnet and the sides of the car, took photo's of every thing, took the car back the next morning to show the manager all the stuff. He noted everything and explained that he will inform the general manager about it. The car drove exactly the same as 4 weeks earlier, same symptoms. So now we are looking at 12 weeks, before my car is back in the state it should have been after week 4. During the first 8 weeks no courtesy car was offered, I had to drive my wife and kids to work and school twice per day in traffic, no compensation for that was given, I asked them for a discount on my invoice due to the 8 weeks of inconvenience suffered and lying to a customer, thinking that they could get away with it, I was told they had to first check their costs margins after the original transmission was rebuilt after week 12 and then they will let me know. I sent them quotations for the engine covers and air box housing that was broken and damaged (R5400) and for the valet (R750) to clean my car. I was then informed that Mayfair will rather try and source 2nd hand covers and air box housing as due to my car's age because it is difficult to prove that it was damaged and broken while it was in Mayfair's care, well clearly someone didn't look at the photo's I sent them, nor did the manager informed the general manager that the car's engine compartment was in mint condition when I booked the car in and when I brought the car to him the next day after week 8 the damages were not reported to him. Mayfair promised to pay the valet quotation amount last week, no proof of payment, no notification, no money in my bank account today, no discount either on my invoice because the cost margins are so tight after Mayfair rebuilt my original transmission after 12 weeks. Who's fault was this? Mayfair ignored my written instructions, **** to me about my original transmission for 8 weeks and do not want to own up now on the parts they have damaged and broken with clear photo's and inspection by the manager the very next day after week 8 as evidence given. Mayfair should change their slogan, because "first time right" is not a true reflection of their service at all.