Eskom over billing

I have fighting to be billed correctly to no success. First I was billed as a business entity but later changed. I took it up to submit monthly meter readings but they're ignored and instead Eskom estimated the billing. Now they've send a vill amounting to R8500 with the reasoning of correction from Oct 19 - Jul 20. I have approached Consumer Ombudsman but referred to Public Protector. No response from the Public Protector after forwarding proof documents. I'm afraid Eskom will cut the power as a quick solution. How do you pay for services and still have to cover the contracted company obligations, I mean there's no actual meter reading, because it doesn't correspond to the submitted readings. I haven't used electric stove and heater and my family is small. How do you use 1000 units throughout irrespective of season, please help