Problematic Vehicle and No Resolution by Cape City

I've purchased a Polo GTi 3 - 4 months back. -2 weeks later the car had an Electrical Wiring fault and a Map Sensor fault. This made it impractical to drive as the car would jerk all the time. I got the car back after 2.5 Weeks and then it had a Tyre sensor fault. I drove a loan vehicle for pretty much a month. i then got the car back and drove for approximately a week and i had to then put in water every single day. I sent the car back in as they were going to work on a solution to credit that car so i can get another car in replacement. The sales guy then said please bring the car in as it needs to be on our floor to credit