A few years back I was refused a PP upgrade at a totally empty RI over a rainy weekend aside a Corporate office park. Nasty FD clerk lied over and over that they were full for Fri & Sat nights.
I wouldn't let it go and at 5pm made a reservation for six 2BR's. She moved us into a 2 BR (from a studio) and claimed she would take care of it. At checkout I was given a bill for double the expected amount and same clerk would not correct it. I left a message for the GM as I left and received several apologetic emails from the GM the next day.
Squeaky wheel gets the grease...