Back in Arequipa: Greeted by a 12 hour power outage

Well I've been out of town for a bit lately for business. Now I've only been back in Arequipa for about 5 days and there has already been another power outage. This one was scheduled for 5am until noon on Sunday the 14th. But for an unknown reason, the power did not come back on until after 5:30pm on Sunday. We made about 40 calls to the electric company and none of them were answered. I'm not sure what areas were effected by the outage, but certainly Cayma was among them.