Arrogant and underming customers and swearing

Wow,I don't know what to say to this company ,actually I am very disappointed about the manager of gyz pitzerat lindo park ,we bought a car in cash on 8 November and the sales person said the car is in good conditions and we bought the car ,but in few days the car give us a problems ,the break pads and bull joint and the shocks are disaster and we have to repair the parts ,and wen we took the car to mechanics he said the turbo is not plugged and that's why we not feeling it wen the car is moving ,ohk finally he plugged the turbo oooh men it was a disaster after we plugged it ,it was smoking like **** ,after we took back the car to gyp pitzer motoring , wen we get there to talk to the salesperson he said we must go to the manager ,fine wen we get to the manager ,he said he can't help us cause we already sign the paper ,so we explained to him its only ten days after we bought the car ,he was shouting at us and swearing he will do anything to help us ,its our problem ,so my main question is how can you sell someone a car that you don't know anything about it and expert someone to just fix like you buy bread that you can throw the bread in the dusbin ,the car goes on 60 speeds not even 80 ,but wen we talk to the manager to fix the turbo he said we must pay 24000,00 rand so he can fix it,how cause he **** to us about the car at first ,so guys I want to give you advise stay away from Gyz pitzer motoring in lindo park that manager is so arrogant ,and he doesn't treat the customers with respect ,stay as far as possible ,I know about my review in that garage they selling ******* ,oh yes outside the car is nice but inside is rotten potatoes ,gyz pitzer what a big WOW ,