HAAL EDENVALE_ALMOST died in a second hand vehicle purchased

I bawt a pre-owned polo cross. upon test drive I noticed a wheel noise. Papers signed, deal approved and the salesman advised it will be repaired, I was also told that for 6 months I have return and fix policy. Upon collection, I was told to drive the car and all will ease up. Drove the vehicle for 3 days, picked up a clutch issue, the abs pump failed while having kids in the car. I wrote a report, sent it in, and I was told bring it back. when I entered, the salesman said I drove the car sh!@. I left the car, was reassured after 3 days the car was perfect... GUESS WHAT same wheel noise, same idle surge, brakes failed again, this time no ABS light. so what happened. ive asked for the DEKRA quality check and roadworthy certificate since date of purchase and I have not seen it. Ive got an independent report from an RMi dealer confirming the wheel isse as well. The workshop manager says the breaks failed and abs light came on due to the wheel sensor? so why did I loose all breaking???? today I get a call and the Sales manager says it was not the wheel, it was the tires. SOOOOOOOOOOOO how did the ABS ligh come on and brakes fail. The workshop does not know what they are doing and are putting my life in danger. I have a written record stating I can return the vehicle for the deal to be cancelled, and now they refuse. saying there was nothing wrong with the vehicle only tires. Which apparently they swopped of another polo on the floor. SO ***... does the workshop ***** parts of other cars, or disable warning systems... or or or. do they even no that a bearing noise cannot cause break failure, or alignment issues, or the back wiper blade being worn, or the clutch failing, or the window washers not working..... justa tawt. I would be very cautious around this dealership. After sales service s@#s, Management S@#$...