This is not an Airbnb, it's a hotel. I've never received a response to my Airbnb messages so after a few attempts just went straight to the hotel reception. They were really helpful and responded within hours.
I liked staying at the place - it's a beautiful room, built in a traditional Santorini fashion with a private hot tub just outside my window! The location is ideal too for those not bothered whether they are in the middle of the town (and for a fraction of a price too!). It's about 10mins walk to the main sights of Oia.
I had a few mishaps with the hotel. My check-in, which is already pretty late at 3pm, was further delayed by another hour! I did receive a complementary drink which I enjoyed, but in the meantime my suitcase was taken by some other guest by mistake and driven miles away. It was pretty stressful, but eventually I got it back. The water in the shower was not very hot either, but I found this is something quite common in Santorini.
The hotel staff are lovely and hospitable. Don't hesitate staying there, but also mind that messaging via Airbnb won't probably work.