Hyundai Centurion car damage

Hyundai Centurion - my daughter dropped het Hyundai i10 off for a service today , she showed the service representative where the anti hijacking button is in the car , an hour later she received a phone call from Hyundai that the doors of the car does not want to open , who ever tried moving the car did not press the anti hijack bottom and the hole system is now not working , driver door does not want to open . Hyundai centurion workshop manager refuse to help saying that its not there problem even when the car was dropped off in perfect working condition. Bad bad bad service , will never take the car back to them