Bad Service and was sold malfunctioning car

Bad experience since I bought my Opel Corsa 2022 at Williams Hunt Midrand. The car kept popping the high collision alert warning. and I kept sending it in for service but nothing was fixed. 2 days ago I sent the vehicle for the very same issue, and I got called to fetch the car as I drove out of the dealership after 5km the car broke down again and I had had to tow back the car. This means they never fixed the car. Now that it is back communication is slow and there is no feedback whatsoever!! The Service there is **********!!!