I have had them call me as well and I also moved away from NYC years ago and told them I no longer live there. They just called me once again today. Sadly, this isnt a permanent fix. Clearly they have stolen a list of old account holders...
Caller said I could get lower rate on my Con Ed bill. When I said I was also on an Esco supplier he said he couldn't get me a discount. He knew what my last Con Ed bill payment was. Wondering how he knew what my bill statement said. He did not claim to be from Con Ed.