Same here. 9:21 A.M. CST on April 18, 2016. My cell phone's Caller ID read [No Name] on top of that. Luckily, I turned my phone off as soon as I saw the number, knowing just how many OTHER 312 area code calls I've received in the past.
Called my cell phone number twice. Hung up. No message. When I returned call I received 'The survey is now closed. To be removed from future calls, press .....'
Called me on my CELL PHONE, of all things, @1:13 P.M. CST on April 25, 2016. This is the second time they've called me, too. Wish I knew how to block them...