Terrible customer service. They say they are here...

Terrible customer service. They say they are here to protect guests from bad hosts, but in fact they are there simply to string you along while they do nothing. I have been on the phone with six different AirBnB case managers about a problematic host who has been completely unresponsive for multiple weeks following booking. Each case manager seems to know less about my case than the last, and now my "escalated" case manager is unreachable, even by other AirBnB agents. AirBnB has done nothing except repeatedly extend my waiting time. Meanwhile I cannot book a new reservation, and availability is decreasing and rising in price.