If you paid her money, do you have her full name and bank account then?
If so, then you are in a much stronger position. Threaten to report her to not just AW to get her profile shut down but the police and, as you have her name, "out" her as a prostitute on Facebook to her family and friends.
I would ask for your money back, rather than any service, because she has proven herself to be untrustworthy.