@Susan4286
Emiel is, right, you're better off without this guest, even with a full refund. Airbnb will almost always rule in favour of the guest.
How did this guest book your place? Was it instant book? If so, then you might want to consider turning on all instant book filters, or turning off instant book altogether.
If he "inquired" or "requested" the booking, then you had the opportunity to "vet" this guest by asking questions like, "can you tell me what interests you in booking my house"? " How many people do you intend to have there? ". If you feel uncomfortable with his replies, you can scare him away by saying it's not a good fit for his purpose, or demand a large security deposit.
@Guillermo494
Airbnb is usually fast because they have automated replies, but in general, I've found host support to be unhelpful, misleading, and involving Airbnb support can actually be pretty damaging to the host.
The best way to avoid these conflicts is to extensively vet your guests and keep the bad ones from booking in the first place.
And if one slips through the net, unless it's a complete disaster ( which you should have been able to prevent in the first place), then involving Airbnb can be a nightmare of nonsense, and actually result in penalties to the host while rewarding the guest, even if the guest is irrefutably at fault.
It's not fair, but your first mistake is letting the offending guest book in the first place, and subsequently, involving Airbnb.
Watch your back. It's not that hard to do. But absolutely do not be under any illusion that Airbnb has your back. In fact, as a host, they can be your worst nightmare at times. Do everything to prevent it from happening in the first place. And if it does, avoid Airbnb support.