What can I do to help my hypnotized girlfriend?

My girlfriend has recently come back from a camp called 'Soul Survivor'. This camp is christian, and here they teach you about god and force worship and so on. But, unfortunately, as she was away for a week, she's practically been brainwashed, and now she's a lot different, i've spoken to her parents and they both agree, and they've tried talking to her, all that she suggests anyone can do is just wait and hope she gets better. Is there anything I can do? What can I say to her to make her realize how much pain this is causing me, when she thinks she's better off than she was before? How can I get her to remember who she is?