They called; I didn't answer; they didn't leave a message.

I get the same recording from several numbers.  An electronic woman's voice with an "urgent message" regarding my electric bill, claiming that my rate is due to increase 14% next year, and they can stop it if I press "1".  To be removed from their call list they ask you to press "3".  After numerous calls and me either not answering, or answering and then hanging up after not saying anything, I got frustrated and answered and pressed "3".  The calls did not stop.  Finally I pressed "1" when they called this time, hoping to be connected to a live person so I could demand to be taken off the call list, but I got nothing but silence and then a disconnect.  I think it's time for me to buy a call blocker.

Didn't answer, got a VM of a recorded woman's voice saying either "reasonable" or "recent bill" then silence.

Call. No message.