I've been getting these calls since 2010.  I've reported it to everyone under the sun.  Here's the problem.  They mask the number they are calling from, which is why when you call back you get out of service or other messages.  They are a total scam.  They have called my cell, my work, my family and friends.  I had to show my employer and family warnings on the internet so they would understand I am a victim not a deadbeat or wanted criminal.

They try to get around the FDCP by saying it is about criminal charges for committing fraud.  But of course if you are willing to pay them, they will make it all magically go away.  Sooo annoying!!!