Behold, this host has multiple rooms available (same building), and is in no way embarrassed giving you a totally different room than the one you booked.
We were in no way informed in advance.
After asking, the host simply told us the room we originally booked was ‘occupied’, and we could only get it the next day.
Furthermore, the airco did not work.
In the morning, we were awakened by a very annoying barking dog.
I will not book this Airbnb again when visiting Valencia.