Very disappointed in Daly Ford Potchefstroom - they lost a customer.

I took my Freelander II for a minor service and to fix my front passenger window. Received the car back and realised that the same passenger door does not want to lock anymore, and when I try to lock my doors while driving, all the doors fail to lock. I called them and asked that they will have a look at it only to quote me for the repairs. Spoke to the workshop manager and he refuses to take responsibility for this. He just says it's bad luck, Freelanders are notorious for these problems. How do just say "bad luck" when they were the last people working on it, and I gave them the car in a working condition. I am shocked and disappointed. Is there no more such a thing like client service. They are no better than the government.