My sister booked a room for 4 nights in Tower 4 Rm...

My sister booked a room for 4 nights in Tower 4 Rm 4879.our of the 4 nights, we have to make 2 separate trips to the reception counter 1 because she was locked out of the room.
Readings given to us was we did not pay our government tax of $10/- each per night of ethnic we were very sure we made upon arrival.
This happened on the third night and last night of her stay.
I had to walked all the way with her to the reception counter every night for the same trouble and it really tired us out
especially when we have spent long hours at the casinos.
What we could not understand was that how was it that the recently did not do the processing for the whole 4 nights and repeatedly locked us out of the room. This really made us feel very tortured.