No Courtesy Car for the customer

Since I have purchase this vehicle brand new I have been having problems with the car.37000Km on the clock. Everytime my car goes for its service I complain about a delay on the petrol which was only fixed now after I had to return my car because of a faulty fuel gauge or whatever they want to call the problem. I complained that the car is not fuel efficient as I Would be lucky if I get 12km p/l. I had my car back now for about three weeks after they fixed the fuel gauge problem and guess what it is currently back at Lindsay Saker as it is still faulty. When I phoned now to request a courtesy car the consultant said there is no cars available and while they are waiting feedback from Volkswagen on what the problem can be he wants to give back my car till they can figure out what's going on. Thus far I Have been very nice and to say the Consultant Anton that i'm dealing with is a very nice chap. But I had enough. I am paying my ass off on this piece of **** and they can not give me a courtesy car while they are sorting out this ****. Volkswagen will never ever see me again and as far as I go I will let everybody know how **** they are. I am considering taking this up with my lawyer