They call every few days and I can't tell you why. My guess is someone picked up a "work from home" job and doesn't understand it. They give these people lists to call for collections or sales or whatever, promising to pay for calls made. Maybe I'm wrong, but it makes the most sense, and either way it's not worth answering.
Just block the number or list in your phone as "Do Not Answer" and you'll be fine.
Called the number back and a recording stated they would get someone to help me. I hung up. They call every 2 days or so, don't leave a message and are very peristent, which is annoying.