Just terrible, I'm so sorry how this has gone for you. Being betrayed by a spouse for leaving the cult is a tremendously difficult thing. No one deserves to be treated like that. And having your daughter in the middle of it - I can't imagine how difficult that makes it.
Make sure you record everything - all the times your wife needs you to watch her, all the times that your wife goes back on agreements for when you get to see her, etc. Talk to a lawyer. IMO don't try to go back - show your daughter that you stand strong and have integrity and she'll follow. I wish you the best of luck whatever you do.