"Senior Benefits" phoned my house at 04:00AM! No message left. I will not call them back, as I don't want to give them the satisfaction that they reached and irrrrrritated someone.
So glad I found this site and people said the opt-out works. I called the number back, and connected with an automatic opt-out message. I confirmed the number that called me, entered my number to be removed from the list, and confirmed it when repeated back to me. Takes under a minute. I've probably received 50 calls from this stupid telemarketer (I never get past the ship horn before hanging up).