@Ann31968 I'll tell you what happens when you ask Airbnb to intervene on your behalf: your call goes to an outsourced contractor with limited English skills who doesn't fully comprehend the situation. Hours or even days later, they contact the guest with a totally inaccurate version of what you wanted to say. The guest either denies receiving any message, or gets angry that you reported them to the company instead of talking to them yourself. Meanwhile, the visitors are long gone, so everyone's time has been wasted.
It's really not worth involving Airbnb just to enforce your rules. That should be a last resort if all direct attempts to solve the problem fail and you need the booking terminated.
I know it's really uncomfortable to have to physically approach your guests and ask them to send their visitors away. But it's just a part of the job of hosting. If you deal with them face to face, you have the most control over the tone and, if necessary, you can de-escalate in real time. If you have concerns about your safety, you might consider enlisting a Co-host who is prepared to help you defend your house.