We made a reservation through WhatsApp few days in advance. They told us that they had a room available.
When we arrived, the guy said that he has another hotel, which is some kind of a friend's hostel, not another hostel. No excuses, no explanation, nothing (just a cup of chemical orange juice that we've thrown into the plants)
We stayed at the other place because we didn't want to go around the city to look for another hotel as it was already late in the day. We moved afterwards not to give our money to those not respectful people.
I would recommend you to go away from this place as Yazd has so many accommodation to offer.More