I have experience similar issue .... checked in, room is not ready, so I let fda do the paperwork and ask them to call me when room is ready as I have other things to do.
Hotel did call me in the afternoon but I only manage to pick up the key very late (11pm or so). Went to the room and realise the mistake, I return to front desk to inform them the mistake. After checking my confirmation email, they realise the suite I booked was sold out. After long wait ... almost 2 hours, finally they assign higher category suite.
During the process I never create a big fuss or anything.