Read the Airbnb article below on how to contact someone when you are feeling threatened by a guest. It's a good idea to have e but this incident documented but there's not much they can do their end I fear and your best bet is to contact the police.
I experienced this on Halloween last year. Over 30 people came into the property, even though the maximum allowed is 6 guests. I contacted Airbnb, and they cancelled the booking and told the guests to leave, but they didn’t. I called the police, but they arrived after 4 hours and didn’t ask them to leave. The guests finally left the next morning. I found a lot of damaged items.