Refuse to correct blatant incorrect overcharges on water and electricity

I am at my wits end! We were blatantly overcharged on our September 2019 municipal account for water and electricity due to incorrect meter readings used (even though I email the actual readings to them every month on the due dates as published by CoT) and incorrect consumption charges. E.g. we were charged R675 for 36kl of water per the August 2019 account, but was charged a whopping R1 406 for a consumption of 37kl (only one kl more than in August 2019! I contacted the CoT call centre on 25 September 2019 and was told to follow a certain process as advised by her and that a call would be logged to the billing department to correct the incorrect charges, but that the corrections would only come through on the October account. I paid an amount more or less equal to what our usual monthly account charge is and called them again on 14 October to ensure that a "hold" is put on the account so our services would not be disconnected for not paying the +-R1800 overcharged amounts for September, only to be told by the agent I spoke to on that day that he had no idea about the process I was advised to follow by the agent I spoke to on 25 September and that according the him the charges and readings used on the September account were correct, even though anyone with a little common sense could see that that was not so! I then tried escalating the matter to our Ward Councillor, who escalated it to the Escalations Department and forwarded the issue to a few senior CoT officials (I presume) but has not done anything else to help get the matter resolved. It makes me really mad that as citizens we try and do things by the book and we pay our accounts on time, but our complaints regarding the CoTs incompetence are just ignored!