If it is a real elec. company, they should have informed of what company they are but they didn't. If you have not signed something with your current elec. company to inform them you do not want your private info given out to other parties, then all the elec. companies can contact you with their sales pitches.
Recording: "This is pertaining to your current elec. bill. Due to a recent state gov't. deregulation, you are now eligible to receive a discount on your elec. bill. Press 5 to be transferred to a representative to find out which discount you're eligible for. Press 5 to be transferred to one of our friendly representatives."