Here is their OPTOUT information: https://www.surveysampling.com/contact/opt-out-do-not-call/
(I created a new yahoo account just to opt out in case they add that to their email service)
Call came into home phone at 12:30 PM. Called ID read "SSI" (Supplemental Security Income"??). When I answered, I heard what sounded like a single fax tone, and then nothing. I hung up.