Yep...I've had CC Bill do the same thing. They don't seem to challenge ANY chargebacks.
I even have logs of every member I have, complete with IP address and log in times. And I've sent those records to them before and got nothing back from them on it.
And I was doing a VOD on the site for a few years where I let people download specific scenes without buying a membership. (stopped that because of the insanity of piracy)...and I would have the logs of them downloading the scenes and everything...and then when a scumbag would chargeback, CC Bill wouldn't even challenge that!
It was just open season for people to steal.