Bad support from airbnb

I have a guest that made a long term reservation. Airbnb system gave her the impression that she paid for the reservation in full. (Debatable) However when she was unable to pay for the 2nd month of the reservation airbnb was of no help. I got her to agree to vacate the apartment. I am still struggling to cancel the reservation to enable new guest to make urgent reservation for upcoming weekend. Problem is that I am unable to make the cancellation and update calendar availability since this reservation is already in progress. It has been more than 30 hours since I started communicating with airbnb. So far nothing has been done and I risk loosing a lot of money.