Firstly, don't ever pick up the phone when you don't recognize the number. Secondly, don't waste your time with the Do Not Call registry. It's absolutely worthless. Thirdly, go buy yourself a call blocker. It's most beneficial.
Fourthly, have a wonderful day.
I've had about 20 calls from this company and they are really pushy!! Want to know how much you are paying for your energy bill. This is NOT a sales call. BS!