Faulty brand new car

I bought my car at this dealer about 6 months ago and I have been having issues with this car from the 1st month i bought it. Literally every second week I am at the dealer with the car for a problem they have been struggling to fix for about six months now, I even suggested that they escalate the issue to @RenaultSA for assistance and they did not pay attention to that because they do not care, had i had known that I will be suffering like this I would have not bought a renault car. Last time I took my car there they said the issue is the gear box and accelerator pedal, they said they will order the part and change it but till today no one has called with developments and the car is still giving me issues, i will say this, I most definately regret buying my car with them if only i could turn the hands of time I'd do things differently.