Just in case people are interested. You should NEVER say yes or no on the phone to any questions from an unknown source. Sadly, they can record your response and when you get some sort of charge you weren't expecting, they can defend themselves.
No comment. Not interested. Etc. Or, best yet, just do what you probably have trouble doing because you are trying to be polite. Simply hang-up with no response. It won't stop the calls, but due to stupid rules around the no-call lists, they won't stop anyway.
I get a robo call from this number every day. It sounds like a real person, and he says "I'm with home mortgage advisers, can you hear me okay?" No matter what you say, or whether you are silent, they immediately hang up afterwards. It is obvious they are trying to record your voice saying "yes" so they can scam you into something.