Yes these people are very obnoxious. No matter how many times you say no, they call again and again. Called them back and the voice mail said to opt out press 1, and it will take 24 hours to cease calling me. We shall see.
Repeat call offering to lower my electric bill. Pressed zero to speak to someone and when I asked to be removed from calling list, Esme hung up on me. Tried calling back and pressing 1 to opt out as suggested by Pesty. We'll see.