Problem is that payment for room service.
I ordered the food first night and was asked to pay for it when the food is delivered to my room.
Therefore, I paid for it and I signed the receipt that time.
Then when I checked out the room, the stuff told me to pay the food although I already paid.
He asked me the name of the stuff, but of course I did not know is name. the he showed me the receipt, which was with some body signature but not my signature. I have no idea how come this happens.
Eventually I paid for the food at check out because I needed to go to the airport.
I was really disappointed their behavior and service.