POOR CUSTOMER SERVICE

I took my car to Renault Umhlanga on the 30/07/2019 as the car was showing Toxic warning light and it was loosing power when the light is flashing. I had to stay for more than a week without a car as Riyadh Khan explained that they need to order the parts. Car was only fixed on the 08-08 and I collected the car on the same day *it was Thursday* on Saturday the 10/08 car started doing the same thing I had to take the car back on the 12/08 and it Rayvan that assisted me, he called me after 3 to 4 hours to come and take the car and when I was there he advised me that it the petrol filter that was dirty they had to clean it. I used the car for more than a month , on the 21/09 when I was on my way to Donnybrook I experienced the same problem again I came back from Donnybrook and I called Renault Umhlanga advising them that I am still experiencing the same problem, Riyadh booked my car and he advised me to bring the car on the 27/09 @7am. I went there and I spoke to him and he advised me that they will check the car and let me know. He called around 13pm and he said it something else that is faulty*sensor for exhaust* I need to get someone that is dealing with exhaust to help me with this. My question to him was how come they didn't pick up this and that means I paid R9174 for nothing as the car is still doing the same thing, I am really not happy with this maybe if the car was doing something else I would have said maybe now it another faulty. To me it seems like what was repaired was wrong and I paid so much of much but I am still not getting help as they telling me different stories.