They call at least 6-7 times/day. I never answer, awaiting for them to leave just ONE message. Nothing. It doesn't stop! I'll tell you what, if you want to piss someone off, put their name on the list to be called by this number - they'll call them ALL DAY LONG for weeks!
I filled in a form to request info about a masters degree clicked submit and in less than 60 secs this number called me - no message... i guess I can expect lots more based on the comments here. All I wanted was to peruse reading materials :(