Faulty lock system door after 2 years still faulty and nothing is being done

Worst service ever! Never trust the work this people give. We bought your VW Polo brand new there and then the lock system is faulty. We bring in the car just to collect it after many hours of nothing being done on the system. They said they did order the wrong parts. So we bring in the car for the 2nd time, just to know that they could not fix it because the one that works on the cars is not there. So for the 3rd time we bought the car in just to drive 3km and just experience the same issue of the door system lock. And since (2 years later) nothing is yet changed and we drive a car that has a faulty door lock system. So please never use them for anything. Rather go to BMW or any other. VW Menlyn don't care about customers.