I have gone through this shit (approx 6 months ago).
A booking I made on AW had to be cancelled, at the last minute, as my meeting had overun.
The WG concerned left me negative FB, which I then disputed. Unbeknown to me, she left anonymous note against my profile, accusing me of asking for BB sex!!!
At the time, a kind verified AW WG and a UKP member (no names mentioned) helped me find out what was written on my profile.
I emailed AW and mentioned about this malicious hidden note, together with a short note stating how long I had been an AW member for, and all the other positive reports I had.
Although the WGs cannot see who left the note, I'm sure AW can, and credit to them, they must have put 2 and 2 together, and worked it out it was the same girl, and creidt to them, they removed this note from my profile.
hang in there and send AW A similar email. if the malicious comment is about BB, then they may not remove it, given your other FB of who else you've seen. At least have a go in trying to send them an email.
I would have suggested asking Dani, but AW have removed this function from her, after another jealous WG reported Danni to AW for forwarding such notes to the punters (as punters, we are not supposed to know about this note system).
Ask a verfied AW WG whom you know well, to find out if anything is written against your profile.