Disappointed is an understatement

Pathetic horrible service, lack of accountability and an attempt to **** me! Took my car in for an Engine light problem and paid R23240.40 for an apparent NOC sensor which was supposed to solve the problem, was called that car was ready for collection. Drove 5km and engine light came back on. Booked the car in same time and again was called that the car is ready for collection after “ upgrading the software “ .Worst 3 weeks ever! My car is still at Merc Constantia because I refuse to pay another 29k for an apparently adblue problem. When I ask for the old NOC sensor that was replaced, no one seems to know where it is which is pathetic! Someone needs to catch a wake up really because I am taking this matter further