Here are a few ideas:-
(1) Could it be the Service Provider who has flagged your account? Unlikely, as it sounds like you had a great punt, and have no reason to think the SP would do such a thing.
(2) Maybe the SP's account has been hacked, or is controlled by someone who has, for whatever reason, reported you.
(3) Another possibility is that AW think you are colluding with the SP in some way to boost her ratings.
(4) Were there others responding to your RB who took it badly that you didn't choose them? They could report your account.