Contact the attorney general, also inform her you are contacting the attorney general per fair debt collection calls. Her name is Christina Jones and she has a habit of falsely identifying herself.
The kind of social pretexting described in this thread would be considered deceptive practice from a debt collector, therefore illegal, therefore actionable in court.
Learn how to exercise your FDCPA rights as an alleged debtor at FTC-dot-gov.
http://www.ftc.gov/os/statutes/fdcpajump.shtm