Oh man, I'm sorry that they got to your money! At least you followed the trail to the respective accounts. But now what? As far as I know, Hive is not great on top-down policing. I've never heard of accounts being directly banned from above. Instead, they get downvoted out of existence. For that I would contact HiveWatchers, or similar organizations on the chain. I'm personally not a great fan of them, since I have a few friends who have been downvoted (seemingly) without any good reason. But this is exactly the kind of case where an organization like them would come in useful!