@Gordon0 how long does the reservation have to go, 2 nights? If it's only that I probably would not say anything and just leave the appropriate review. Something like:
"So and so were friendly guests. There was more noise than anticipated for 2 people and extra late night guests. Left our place in good order (or extra clean up required, whatever is true) . We would recommend to hosts who allow additional visitors during stays and don't share walls "
Then low scores on house rules and communication at least. Up to you if you want to say you would host them again or not.
If there's escalation in noise or partying on nights 2 and 3 I would probably call Airbnb with the cctv shots of extra guests and ask them to cancel the rest of the stay.