Fiance booked 2 bedroom apartment months ago which...

Fiance booked 2 bedroom apartment months ago which advertised 1 queen 2 singles and a sofa bed as she was having family and friends up for her hens party. Check in to find 2 queens and no sofa bed. Rang front desk to say this wasn't what was booked but was told hotel was booked out nothing could be done. No roll aways or anything. Instead they brought up an extra pillow and sheet for someone to sleep on very short couch. My fiance's mother and sister proceeded to find alternative accommodation at the Doubletree on the esplanade. Room is small with damage on ceiling and room doors. Mould in Bathroom and the mattress on our bed sagged. The chairs in the living area were also worn. All this from a 4 star hotel. Plus mushrooms growing in the decorative garden (knew they weren't fake as they'd changed overnight). Needs major refurbishment and customer service was also very lacking, couldn't care less the room wasn't what was booked.