On our way to Bilbao, two hours before the check-in, the owner called me telling me the room I booked was not available because the person who was supposed to clean it was not available. I told her my girlfriend and I can do the check in later, that was not a problem, but I was told it was not possible.
In the middle of the conversation I said OK if there is no other alternative (I was pressed for time to look for other accommodations anyway and the prices of course would be very different).
I asked the owner if the price can be changed, since she was offering a cheaper room and also with a shared bathroom. She called me again very eager for us to cancel the reservation, saying it was very cheap, that she cannot do anything and also for her family to use the room.
This is in my opinion an unpleasant experience, because also I remember there is a specific fee for cleaning. With this short window of notification, we were left with no other alternative than to say yes to her new conditions.
I understand these kind of issues can happen, what we didn't like was that the host didn't offer us to lower the price for a room downgrade(shared bath which is also listed in Airbnb). And well, she telling us to cancel so her family could use the place seems to be very inconsiderate of the inconvenience that it would cause us.
In the end we were scammed. Make sure to take photos otherwise Airbnb will not do anything about it.