Help - regarding Negros Power bill

Hello! Just want to ask insights from you guys. Nakareceive kami bill from last month and natingala ko may unpaid balance sya. Ngkdto kami sa office nila to confirm, hambal nila unpaid dw amon November 2024. Dba usually dapat kung may unpaid ka pa na bill, nakabutang sya sa new bill na gna issue nila? Kg isa pa, ndi man sila guro magsugot na bayran ko ang december without paying the November bill.

Imagine after more than a year, subong lg nila iadd sa bill namon.