Called someone answers and then hangs up the phone

Got a call from them today, Googled the number to see whose it was since there was no one on the "Unavailable" other end of the phone when I answered. I did a callback...sure enough, a recording said the call was from "Direct Buy"...this is not the first time. We get numerous recordings from them where sometimes they launch into their recording and then this type when no one is on the line... but we never call or use their company. Maybe Direct Buy doesn't mind wasting their money and resources in this way...too bad that their marketing amounts to harrassment and consequently, we wouldn't ever even consider doing business with a company like this.

My situation is the same.  At least once a week for quite some time now.  I finally decided to call the number back, and get a voice recording from Direct Buy the home improvement reseller.

Called and when I pick up no one is there