Called back and if you don't use the phone they called you get dropped. It's a scam www.heycosmo.com is the website. Just incase you all wanted to know it. Now you have the info do what you want
I am on a no call list and this # has the nerve to call and think I won't investigate - I called from a different phone # and got a message "welcome to Hey Cosmo, please wait while we retrieve your record" and it of course hung up since I blocked my # before calling..
got the call, no message, called on a restricted number back and got hey cosmo. then googled it and got this
http://www.heycosmo.com/prankster/prankster_prank_stories.php