You're # is in an autodialer. You probably gave your # to some website when you registered or bought something. Manytimes people have spyware which will send your # out to various companies. It doesnt matter if you're on the do not call list because the way this works the computer imputs your # as if you're asking for a follow up call. I worked as a telemarket off and on during college so I know the way these things work, and there's really not much to be done until your # is out of the autodial system. What they're doing isnt illegal, just very annoying