They have sell me a faulty car.

I bought an Audi A3 from Toyota Edenvale on the 15th of December , on the 27th of December it give me a battery error I have let the sales man aware of it but he told me I should buy it myself. During the starting of January around the 15th my car started to have brick pads fail then I decided to take it in Midas to be checked they have advise me that the brick pads are finished ,then I bought them still I have made the dealer aware of this in an email which was not replayed. During the 3th to the 7th it started to over heart whereby I couldn’t drive 1kilo without a warning to stop, then I took it in Bens Auto to be fixed , I was advised the car have lot of fault which can cost me up to 70k if I want it correctly fixed. Then I have let the deal know about this but they said the guy who serviced it was a problem so they refuse on getting involve in the matter.