Might be a telemarketer from Great American Power, an electricity supplier company in PA. It could be a legit call from their customer service, since I was a customer at some point in time.
It is Great American Power and they are legit, I used to utilize them through Duquesne Light. I actually had no issue with them but when I stopped using their service they began to call ALL THE TIME. In three days they averaged 6 calls per day, obnoxious. And customer service person, Tiffany, if you are reading this- you can go to Hell for telling me to lose my attitude.