@John1599
I'm sorry for your situation, which sounds horrible. However, I am not surprised that Airbnb are not helping if the guests have not broken your listed house rules. Also, they probably don't see the guests' actions as major infringements (not the same as bringing extra, unauthorised guests, for example) but I can see how it's a total nightmare for you.
Being really specific in your house rules is a must and I make sure all guests confirm in writing that they agree to them. Firstly, it's helpful to ward off undesirable guests, set guest expectations and useful when I have to politely remind them that they should or shouldn't do this that or the other. Secondly, it's essential when you need to get a guest off your property.
I have only done this twice, but each time, Airbnb was very helpful because they could see from the correspondence (always keep this on the Airbnb messaging system) that the guests had broken the rules stated on the listing. This was the first thing they checked. They even removed a bad review/ratings once (sadly they don't seem to do this anymore) because the guest was complaining about stuff clearly outlined in my house rules and had told me during her stay that she didn't have to follow them.
People will say that my rules are far too long (as is probably this response) but I don't care. It's better to spell it out than regret it later. I have added to them over time as unexpected problems like yours have arisen because people are weird and because what I think is 'normal' or 'reasonable' behaviour is purely subjective.
Mine include telling guests not to adjust any heating controls, not to use electric heaters, not to eat meals in the bedrooms, to keep the space clean and tidy etc. I also specify that guests must pay for any damage to the property or its contents.
Of course, guests do still break rules, but then you have a comeback if you need to get them out of your listing.