Bad service / no service

Took my Huydai I20 in to Montana dealership. Watertank not keeping water - slightly heating up of car. Car is new with 12000 km only. Booked car in on Tuesday 5 January just after 12. The workshop manager looked into the hood and said it looked like something hit the radiator. Left my car there. I phoned on Wednesday - morning at 10:00 - still didnt look at the car. I complained to the sales person that sold me the car. He asked them to follow up. Got a call for a quote to open the car on Thursday morning only - R1400. I agreed to the amount. I phoned again at 14:00 - no one has yet touched my car - a full 2 days now.. I went to take my car to a \ local mechanic". At 16:00 on Thursday he phoned me and said that the pressure test indicated the radiator cap. I had my car back after 2 hours. and nothing hit radiator.<br> I am very disappointed in the service received from Hyundai Montana. The service manager himself was involved. Hyundai wanted to charge me for opening the car"