faulty goods + no service + empty promises

I bought a used corsa sport 1.4 2008 with 49000km around november 2015. when i bought the car, i made sure to ask if there was anything wrong with the car, the salesman then promised me nothing was wrong. i then made a point about the clutch where he again said nothing wrong. he did mention that the window mechanism was faulty and that they would fix two weeks later. after a week or so i noticed there was something wrong with the clutch and brakes and i felt the car was under powered. so i took it in. when i took it in again they swore everything was perfect and still the window mechanism was still on order. two months ago still my mechanism is 'still on order' and lone be hold my clutch had broken. i was stuck in fourways and the sales manager said it was on me the client to have it towed to fourways. fourways was brilliant. they even stated the clutch was faulty. so much so the new clutch they installed broke again while they had it. so edenvale was wrong!!!! months later and still to this day after many phone calls with edenvale i still havent received the mechanism for my window they promised!!!!!! il never buy another car from gm