Hi @Houda29
Sorry to hear about your experience.
The guest shows up at the party with extra people unannounced. The host has the right to turn them away.
Call Airbnb Switzerland +41 43 50 84 900.
Or do contact the Airbnb support help center via message, acknowledge to the team your concern and the incident.
The Airbnb Support team may not respond to you immediately as they need to contact the guest to listen to both sides and investigating the case.
On Airbnb, hosts can add a fee for additional travelers on their listing. This fee cannot be applied once the guest has arrived and later checked out. It is just another effective measure for guests to know that they must pay extra for additional people
- Submit a change request through to the Airbnb Resolution Center after the guest checks out
- File The request to notified the guest and asked to respond. If they ignore or decline your bid, you can tell Airbnb to intervene after 72 hours. So long as you have an extra person charge and photo. Take photos of the event and the home conditions the guest left, present to the claim
- Red flag the guest profile and feedback an honest review to warn another host
Airbnb help article, as a link below,
What is the Resolution Center?
https://www.airbnb.com/help/article/767/what-is-the-resolution-center
In addition, to prevent the party guest and the top tool as follows,
- To be clear in your house rules and policy or include the guest limit in the rental agreement
- Ask for every guest name and verify document to registered On the booking page
- look for utilizing technology to help prevent additional guests; these top tools should be in your arsenal as Noise Aware, Minut, and Party Squashers
I hope you can resolve the issue.