Bad Experience From Renault Vaal.

I bought the Renault Megane 3 1.2 Tce GTline Coupe 3Dr(2015) metallic white (DEMO to my surprise) from Nissan McCarthy Germiston in 2016 May, when it was about 24000km. 1.4 years later, which is was 27 September 2017 the car was admitted at Renault Vaal, after it overheated 3 days ago and the mileage was about 53000km. Renault Vaal tried 4 possible things that could have caused the problem with the involvement and advise from Renault South Africa. At each possible attempts, they changing parts and putting new ones to solve the overheating problem and with no success the problem was not solved. I went to Renault Vaal branch, where the car is being fixed and wanted to do the trade in because I was unhappy of the car's condition but the manager's response wasn't satisfactory. The response was that he cant do the trade in because I will have a shortfall of about R50 000. He wanted to buy my car with R150 000, mind you the car is still new. His response suggests that I caused the problem whereas they know exactly that was impossible. I'm really unhappy with the Renault Vaal or South Africa in solving my problem and up to this day am still waiting for the car to be fixed because they waiting for the Engine chest part to be delivered by Renault France. Thus Im so angry and unhappy with what is said and wont wish anyone to buy Renault cars. HelloPeter I put my trust in you in sorting out this issue.