Poor workmanshipwhich resulted into bad service

I had the worst customer service from Kelston Motors VW Uitenhage workshop. My problem started with cooling system. It took me more 10 times to drive to them for miss diagnosed or poor workmanshipwhich. In this issue alone I spent >R45 but the problem not sorted. Radiator, water pump, oil cooler and EGR pipes were changed. In all these instances I have to comeback for coolant leak, oil leak, diesel leaks. The worst experience is when I book the vehicle on 29 May 2025 for Major service, the costs were R17.8k fully paid, on on June 29 June the car snapped Vbelt which damaged Cam belt which locked the engine. The car cutoff whilst on the road. I already paid R 21k to repair something that could be prevented during service. I am not sure whether belts were changed or not. During all my experience, I follow protocol starting with service manager (Mr. F Opperman) and the Dealer Principal (Mr. Matin Barnard). In cases I had never feel being appreciated as a customer and try to intervene and sort out the issue. I am so dissapointed with that workshop.