Good afternoon Alexia -
I am so sorry to hear about what happened. Yes, I know all too well, it's very frustrating.
I would contact Airbnb and explain the situation, and your concerns for a bad review based on asking for reimbursement.
I had a very similar situation, with a guest leaving a huge mess at our home. I contacted Airbnb and they were very helpful with navigating a course of action.
Yes, as expected, when I did ask for reimbursement the guest wrote a very nasty review.
But since I had explained the situation to Airbnb prior to asking for money, and had showed Airbnb the guest messages during their stay, telling me how wonderful the house was - it was clear that the review was written in retaliation. Airbnb then removed their bad review. (and I am sure gave the guests a stern warning).
Yes, in my situation, asking for money opened a huge can of worms. I ended up not pressing for reimbursement, as it wasn't worth the drama. But it was a huge learning opportunity as a new host.
I have become much more strict as to my vetting process for potential guests. If they have a few bad reviews, I will not allow them to book. Period.
Also, I re-wrote my house rules, explaining if certain things happened during a guest stay, they would be charged. At booking, I now also make an extra point to make sure guest have read and understand the house rules.
Wishing you well with this and your future bookings.
Best,
John
Los Angeles