You state that the classes were supposed to start at 6, but they actually started at 6. This makes no sense.
You do not state what questions the staff was unable to answer. Did they not understand your questions or simply refused to give you an answer?
It is not clear why you expected to have the swimming pool to yourself. Did you pay to rent out the entire pool? Or is it time for anyone to come and enjoy the pool?
You might want to give examples of the lack of cleanliness.
Student or Learner