To prevent he said she said issues like this, I video tape with a time stamp everything in my suite prior to check in.
I show the clean toilets, showers, fridge, etc,
I show toilets flush, tv turns on and streaming devices work as promised.
I pick up the bed sheets to show there is no bed bugs.
I show AC works, fans, etc.
Yes, it’s a pain to have to do this but this way, no one can claim they didn’t do it.
I started doing this becasue of a situation like yours where you can’t quite prove the damage. Without the time stamp video proof it’s hard to file a claim.