This is the second call I've received in an hour from an unknown number (first one from 321-935-4737).  I did not answer.  Back around October last year there was an announcement that all numbers were going to be available to solicitors and that we would have to fill out a Do Not Call Registry.  Not sure if this was true but I found this out last month.  The website explains that solicitors have a month to remove your number from their list.  Here is the website
https://www.donotcall.gov/default.aspx

I have received these calls several times a day, no message...finally today when I answered someone was there...she says I filled out a survey for a Walmart card (no I did not, know better than that!)  Told me to go on wakanet.com(?) and fill out info...well they wanted your credit card for $2.98 (again, know better than to fall for these things).  I repeatedly told her to remove my number from the call list and she kept right on going talking over me until I finally hung up.  Tried to hit 'contact us' on the bottom of the screen but the page would not load.

I'm not even sure how they receive my number because they called me on my landline and not my cell and I don't give up my landline to anybody