Central Maine Power Crazy, Questionable Monthly Billing Augusta Maine

 Central Maine Power's Accounts procudure is questionable.  We've been paying ahead for months in hopes of reducing our overall monthly budget payment.  Currently, we are so far ahead in payments that the monthly bill is ridiculosly low,  YET the MONTHLY BUDGET BILL REMAINS in the hundreds.  We've paid ahead for months in hopes of lowering our monthly payment plan. Recently, the plan was reviewed and now somehow our monthly payment will continue to be the same nearly $200/month that we have been paying all summer and autumn. Our usage is quite low because we are out of state for months at a time, no electricity is used. Unplug everything, even the refrigerator. This makes no sense. Talk to  customer service reps and they are unable to explain the billing system or even explain why our bill has so many discrepancies. I cannot understand why the public utilities commission allows this to happen. Aren't they responsible to investigate company over reach?  CMP is the provider for the state.  They have a monopoly and poor consumers like us, on FIXED income are at a loss regarding what our rights are and what steps we can take to improve our situation!