That's an awful situation, @Stanislav56 . I have guests ask me questions the day before arriving all the time, so although it is better to correspond before then, it is not unusual.
Keep trying to reach customer service -- sometimes by Twitter is best -- and in the meantime flag that listing, since there is obviously something very wrong with it. Write a clear and concise review to let people know that the host does not answer and does not provide check-in information. (You didn't receive any check-in information, is that right?)
How were the previous reviews on the place?