Who called from 2819299996

Received a call from this number, called back and they answered, "Security promotions, how can I help you?"

Just muslc played music when i called back.

I keep getting calls from this number on my phone while I'm at work. They never leave a message so I guess it is not important

Received a call from this number, called back and they answered, "Electric Company promotions, how can I help you?"

I called back and it stated, "The number you have dialed is not in service. Goodbye." Huh? You just called 30 seconds ago!