THEY SELL BROKEN CARS

I am having issues with MARKETCARSALES DEALERSHIP, I purchased the kia picanto from them on the 19/11/2024 and collected it on the 21/11/2024. the car is financed by absa. firstly the bumper was loose when I got home they didn't tie it. after I collected the car, on the 22/11/2024 it broke down to some pipe that burst, ok fine I got my own mechanic to fix it and replaced the pipe and they never refunded me that money. again on the 27th of November the car broke down again they said it was putting pressure, they took the car to their mechanic and it took them almost 3weeks to give me my car back, I only received the car back on the 14th of December and still had to pay full installent, pay for insurance and all whilst I wasn't even driving the car. Today it the 16/01/2025 my car broke again and it was taken and on top of that I singed a warning at work because I have been having excuses with a car since last year.

all I am asking the dealer is to give me another car or cancel the whole deal but they seem not to care instead I am being told that I should have gotten the car hire with the insurance if I wanted to have a car all the time.