@Dawn663
- Contact Airbnb Support Help Center to acknowledge to the CS of the incident happened, request the case manager to contact the guest.
Do communication with the guest, remind them the listing is for 8 guests maximum and you don't allow an extra person or party event. Also, do mention your concern about the respectful of the neighbour.
Question the guest who's are the 5 teenagers?
Warn the guest if there is an extra person, they need to leave the listing immediately.
Sent an Airbnb message to the guest after the conversation, remark for an Airbnb reference you did contact the guest.
Follow up, contact Airbnb Support Help Center to acknowledge to the CS of the incident happened, request the case manager to contact the guest again.
In certain fact, the guest is a Superhost, should be observed and beware of the house rules, Airbnb terms and regulations. After the booking, the guest is obligate to share all information with the host, including other guests' name.
I hope you can resolve the issue and be sure that is not a " third party" booking.