Youch, that sucks. Sorry to hear. I know how you feel, I had customer support refuse to credit over $1400 worth of Bitcoin the other day - I wrote a post here about it and they responded and eventually fixed it when I submitted it on Reddit.

Hopefully it's an error on their part and they'll undo it. If it works out fine, it still sucks that they can just take money from your account on their own initiative. Crypto push system is preferable to banking pull system.