First, FYI, neither the contact information on airbnb nor in the check-in PDF is the apartment owner's. The contact info is a third party property management service company "CheckMyGuest".
We were extremely disappointed about the communication during our 4 nights stay. We were happy with everything until when the water was cut-off in the apartment at around 2pm the day before we checked out. We called CheckMyGuest and they notified the apartment owner immediately that we weren't able to wash our hands, take a shower or flush the toilet. We have no water from then to the time we checked out the next day, the apartment owner didn't talk to me or send me any message directly after she was notified about the situation and didn't show any sorry or do anything to make things better/easier for us. Only CheckMyGuest sent me some messages saying that they tried to find a solution with the owner. They refused to give me the direct contact information of the apartment owner. 3 days after we left, we didn't receive any further message from either the owner or CheckMyGuest. If I was the owner of the apartment, I would at least tell the guests that I felt sorry about what happened and try to make things better even if the water cutoff was out of my control.
I will update my review if the apartment owner reach out to me to address this issue. Otherwise, if you are worried about no water in the apartment and no one come to address it, think twice before you book your stay here.