Called today, (from 215-394-1991
) didn't answer and they left no message. They use mulitple numbers 215-394-19xx (and now I learn even 394-18XX). Based on a lot of posts online these are telemarketers trying to get you to switch who supplies your electricity. If you continue to get harassing calls regarding this it might also help to complaint to the PA Public Utilities Commission which oversees utility suppliers.
Tell them you have no electricity supplier as your home is powered completely by windmills, solar panels, donkeys constantly turning a large wheel in your yard and a bio-generator that burns the donkey dung.
If fact tell them you got so much donkey dung piled up you'd be willing to sell it to them for their generators. Ask them to give you the company address and that you'd personally deliver truckloads of the donkey %*&$ to them