This is a well known scam being run out of call centers in India. The scam was started by a guy in Tracy, California. He purchases people's personal information, and then the threatening calls start. I've been getting these calls for 5+ years now. The script changes every few months, but their objective is the same: scare people into paying for fake debts, by threatening to have them arrested. Just ignore the calls, and if possible have your cell phone provider block them. Also, just be prepared, these people WILL call your place of employment. Your personal information is all over the internet, and is easily obtainable by somebody that wants it. They may be calling your cell phone now, but they are persistent, and will call your work.