Bosch Service-Strand BAD

My golf 5 TDI injectors was giving problems after I send my car to Bosch services centre in Strand - Western Cape my starter was damaged and when I picked up my car still the same problem. I was given a loan car for a week and after the week when we went to get the car the problem was worse. After I paid R12 500.00 the car was not fixed and the problem was not solved. only got R3000.00 back with a car that is not fixed. Bad service from them will. Now the car is still broken and nothing was done to fix the problem.