What if a host substitutes another listing for the one I've booked?
It’s always your choice whether to accept or decline a host’s offer to provide you with an alternative listing.
Before paying for a reservation
If you don’t have a confirmed reservation yet and the host offers you a different listing from the one you've discussed, you can make a reservation or simply look for a new place. You have no obligation to accept the alternative listing, and you should make sure that it would work for your trip before booking.
After you’ve paid for your reservation
If your host is asking you to stay in a different listing from the one you originally booked and you’re okay with a switch, either you or your host can change the reservation. Make sure you check the details of the new listing and reservation before accepting a change.
If you’re not okay with a switch, or if your host is asking you to switch without officially changing the reservation on Airbnb, ask the host to cancel your reservation so that you can get a full refund or find another home that better accommodates your stay.