North Shor Agency Scam to collect money not owed by me. Old Bethpage , New York

I received a notice from the North Shore Agency informing me that they are a collection agency attempting to collect a debt of $22.00 for the Leadership Journal. Of course, I never ordered the journal. So, I twice called the number they provided and received a recording stating that all of their agents were busy. They asked me to state my situation and provide a call back number, which I did. I never received a call back from them. Suspecting this to be a scam, I Googled their name and found considerable instances of people who experienced the same thing that I experienced. Their paperwork looks very official, but they are a nothing but a scam.