Billing Wrong since 12/09/2017 with 3 CR#s and multiple failed attempts by Billing Support

I need help with a billing error that I have been unable to get resolved on phone calls with Billing Support for the past month. Here is the history of the problem. I might have some details wrong, but you should be able to look up the CR#s and review the account.

Dec 9, 2017 - (did not record CR#) - I called into customer support to complain about the extended outage due to snow in the area. Specifically, I was unhappy with the poor communication related to the outage. The ETA was not updated until the last minute and then the down time was extended for another 12 hours. I thought this was excessive given how quickly the power company had resolved their outage, despite multiple transformers blowing out in the neighborhood. The customer rep offered me a $60 credit, which I accepted.

Dec 15, 2017 - CR749821569 - Apparently, instead of putting $60 credit on my account, as offered, the customer rep that I spoke to on Dec 9 added a $60 charge. So I called back. The customer rep I spoke to on Dec 15 said they would fix it.

Dec 18, 2017  - CR750997048 - The customer rep I spoke to on Dec 15 apparently did not fix the issue, because the account now had a $65.80 charge. And, the $60 credit that I had been offered had still had not been applied to the account.

End of Dec, 2017  - CR751423414 - The account still had the had a $65.80 overage on my account and the $60 credit that I had been offered still was not applied to the account. I explained the history of the issue up to this point - the customer rep said they would take care of it and that I would be left with a $65.80 balance. I recall pointing out that didn't really add up, but by this point, I was just ready for it to be fixed. The customer rep told me that the bill would update internally, but would not be corrected online until my next (January) bill. I paid the $65.80, as instructed.

Jan 16, 2018 - Today my bill is $201.10 and marked as “overdue” with a $75.30 charge. My bill is supposed to be $124.90. So, now I have a $75.30 charge added to my account, and the $60 credit that I was offered has still not been added to the account, and the account is overdue.

I am at a complete loss for how to get this resolved at this point. Clearly, calling into Billing Support is not working. Please help.