VW Disappointment

Three years ago my vehicle started going in to limp mode on long trips, I took it to VW Highlands and after spending several thousand rands they could not resolve the issue. They then referred me to VW Nelspruit and I spent even more money there. After returning the vehicle twice and even getting my headlights ****** and replaced with damaged lights they could still not repair the issue. After neither workshops could resolve the issue I made peace with the issue as it seldom caused this problem and could quickly be resolved by turning the ignition of and on. Two months ago whilst travelling to Polokwane the timing belt broke on my vehicle and I had it towed to VW Highlands to have it repaired even though I was sceptic after the previous incident. They quoted me to have the belt, tentioner and pulleys replaced. A week or so later they contacted me and explained that the valves were damaged when the belt broke. They quoted me and I accepted the quote to repair these also. According to them the vehicle was misfiring and would not run after this work was done. They then proceeded to check several things on my vehicle including wiring, injectors etc. They finally informed me that the engineering work was not done correctly and would need to be done again. About two weeks later they informed me that the vehicle was done and I went to collect it. I test drove it and found that the brakes were not functioning correctly and that the car had no power. They then quoted me an additional cost to replace wirning harnasses and fuel injectors at +- R60 000.00 to fix the issue. I refused and explained that the vehicle was running fine untill the timing belt broke. I received the car back this week and found that the vehicle is still idling unevenly, is shaking and has now gone into a permanent limp mode with the engine management light constantly on. I returned it to them the next day and was told that the work they have done is good and that the vehicle must have had these issues prior to me taking it to them as I told them that the car goes into limp mode every so often. They then told me that they will not continue working on the vehicle if I did not replace the valves and harnes and had they known that it was going into limp mode they would never have accepted my vehicle for repair. I have driven VW my whole life and have of late regretted that decision. I will now have to find an alternative repairer to fix something that I paid someone else to repair as clearly the OEM is of no use.