What is the most logical next event?

How to complain about your hotel stay
Contact the person at the front desk.
Your first step in complaining about a hotel stay is to talk to the person at the front desk of the hotel. This person will serve as your initial point of contact for lodging a formal complaint or seeking some sort of rectification.
You can do this during or after a hotel stay. Approach the front desk calmly and politely.