Called the number back and received a detailed recording telling me:  we know you're probably trying to call us back to see why we called you.  If you want to be taken off our calling list.  Talk to someone about where to report their business practices, to discuss their business practices or to suggest changes.  It was one of the strangest telemarketing calls I've ever received. I just told them to stop calling me and we'll see what happens.
Aylagh