Faulty Cars

I bought a Mercedes Benz A200 from them and 3 days within having the car the engine light went on. I took the car to Mercedes and I was advised that the injectors of the vehicle were faulty, I took the car back to Kolev and they assured me that the injectors were fine and that they can fix the real problem (that fix cost me R5000) when I got the car less than a month in. 7 days later the engine light came back on again, they advised I bring back the car for another fix, I did that and again it only lasted for 7 days.

They sell faulty cars and fail to fix them yet still charge for their short term solutions.