OVERCHARGED AGAIN!

It is really frustrating to complain over and over about the same thing. It is absolutely disgusting how ESKOM sees it as their right to fleece pensioners. Received a bill for R4200. Ridiculous reflection as I have a solar geyser and a gas stove. Dont know what to do anymore to get this right. Happened last year to and was told that the meter was correct. Eskom made contact on 19 October, 2015 after my email saying that my query will be addressed by the proper department. A week later, NOTHING! Is everyone in that department on sick leave? My Eskom reference number is ***. My account number is ***. Please help, I at my wits end now. I can be contacted via email only on [Email Removed]