Got a call from this number 847-257-8337. Called the number back and they wouldn't identify where they were calling from. Kept saying his name was Mario. Since I don't know a Mario, I hung up.

The got a call from this number that just plays a message when answered.  There is no human on the other end, a computer call with a message recording.  This is a fraud debt collector harassing people who even have no financial issues.