Preowned car dealerships

Hi All I feel I have to let the people of Gauteng know about Brandon the owner of Coston cars I purchased a car from him which has given me nightmares and endless problems. The very second day that I had the car it didn't start it was just dead and he came with a backdoor electrian and fixed 6 months later took it for a service only to find out I had to spend 20k which I had to replace all 4 coils, brake pads, major service, spark plugs, wipers. A year later the car won't start just like before I had to spend a R1500 that's not the end he took my service book which he supposed to stamp and bring back but 2 years later he doesn't sir answer my text, phone calls or emails. Guys I am fed up how do I go about getting a new service book from VW and the existing service history it's a polo that I purchased. Coston cars is a nightmare a con artist and I wish nobody purchases a car from there ever again we pay alot for these cars with our hard earned money for **** like this to take advantage