Just Fyi in your case, Windstream actually owns Paetec Comm. I used them for my business phones and internet when I was in Chicago. Not sure why they would have made calls like that. Anywho, just sharing.
Call your State's Attorney Generals Office when you get this type of har"[***]"ing call. These idiots are just blowing smoke up anyone's [***] they can contact.
They found my unlisted google voice number (or just got lucky) and said if I put a small sign in my yard they would install a security system for free. Lets hope google is not selling our numbers