ENDLESS PROBLEMS TATA BOLT XMS

I purchased a tata bold xms 2016 with 19000km almost a month ago from Renault Northcliff. I was pretty happy with it the first few days. Within three days of having the car there was a knocking sound. After endless trips to Renault they took my car in couldnt find the problem and told me i must have hit a pothole. I had the car taken for inspection, pictures were taken and there was no evidence damage caused by me. The car was then sent somewhere else and the noise was sorted. I also informed Renault Northcliff of the airbag light that stays on and there is a fan noise when the car is switched off. Neither of those issues have been sorted. Since the date of purchase this car has spent almost two weeks back and forth for repairs. This is not acceptable!!!!