Ok, I spoke too soon... you can't block it normally because it's not a real number (starts with a 0 and all)! I called them back and they are 'escalating' the issue for me but said they hadn't heard about it prior to me calling. So if you are getting calls from this number call your phone company and hopefully they can put a stop to this annoying crap.
I just got a call & they said they were the company that generates my electricity. Duquesne Light delivers our electricity & bills us tho. He said we were eligible for 10% savings & they just had to verify my info. I didn't give them my account number because I don't trust calls like this.