OMG this is pretty serious, my friend also lost couple of his pages, the best you can do is to make sure you have contact with facebook officials, but my friend was not lucky and did not got pages back, maybe it can turn out different for you
He might have tracked your main FB acc, earlier i had also someone giving me massive amount for my fb page, i was contacted through my page and he kept on insisting that we should talk through our FB profiles it will be easy to talk
When i said i can only talk through skype the deal vanished along with that guy