The "good luck as this situation unfolds" line and the vanilla-sounding alias names for the reps strongly suggest a South Asian fake debt collector. If you really want to know how they've found you and Gramma and the neighbor's pet ferret, think back to when you or someone related gave away a pile of sensitive data to strangers through an online application form.

To be clear, this is extortion dressed as debt collection. The agents' horrid threats are empty and their conduct is illegal. As early as possible it's critical to determine if your collector is domestic or yet another South Asian faker. The former you can sue into submission; the latter tend to be out of reach.

My notes from October 2011 on payday loan and "hot check" collectors are linked below.
http://800notes.com/forum/ta-429fb24ec2162e3/ ... -numbers-here-2

See also this FTC alert: "Fake Debt Collectors"
http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors
(former title: ''Who's Calling? That Debt Collector Could Be a Fake'')

The following will be useful if you have a US domestic collector calling, and will in general help you sniff out the frauds:

official FTC guidance and staff opinions on the FDCPA, PDF copy of the Act
http://www.ftc.gov/os/statutes/fdcpajump.shtm

CFPB Q&A on debt collection practices
http://www.consumerfinance.gov/askcfpb/search ... bt%20Collection