I had a similar experience with Airbnb.
A guest rented my property, then claimed my fridge was broken and his food had gone off. He claimed £30 for the spoiled food.
Because I like to do the right thing by my guests... I immediately got in the car and drove 3 hours to the property to fix the fridge!!!
I asked the guest for receipts for the spoiled food as I would need this for my accountant.
He provided receipts but the food only cost him £18.... but by this time he had already claimed £30 from me through Airbnb.
I arrived at my property to find my guest had checked out a day earlier than expected and used 4 beds rather than two ( for 2 guests)
The fridge was working and the food in the rubbish had all been out of date, before he claimed it had gone off.
The guest left a bad 3 star review.
I told Airbnb that on his instagram pages and social media he had boasted about the lovely sea views from his bedroom!!!!
Airbnb would not remove this review which I believe was retaliatory due to the fact I had challenged the guests claim for his out of date food, and because I challenged him over number of guests staying as opposed to number he had booked and paid for.
It took me 2 months of 5 star reviews to get back to my previous rating.
I was disappointed with Airbnb on this occasion for not backing me as a host.