I will start by saying, that eventually I got my payment back with no problem.
We arrived at night, when the flat that was promised for us, was given to someone else, and instead, we got a third floor apartment for a family of four people with only one double bed. No elevator as well, it was broken. My 9 years old had to sleep on the floor on the coushins and our 4 yo had to sleep with us in the bed. This is how our night looked like. But they tried to find us a suitable different place, but it was very late, and we just wanted to go to sleep.
In the morning, I informed the manager that we are leaving. He accepted and the money got back to us the next day from Airbnb.
The flat, is nice, and clean, modern. The aircon is week.
As I made sure for a few times that we are going to get what we paid for, and still didn't get it, I can't recommend the communication with the property. Sorry. I have everything documented.