https://bitcointalk.org/index.php?topic=708213.0+Bitcoin and I are going through the same thing.
They keep telling us to link facebook, then to link twitter, then to upload photo id, then to link picture of yourself with id.
And they do not respond back after buying bitcoins and sending everything they ask, I am waiting 10 days now and they still have no responded or giving me the bitcoins I ordered.
Stay far away from these scammers.