People not doing their work

I have been receiving municipal account with (rate, water, sewerage) all on the some document. Then at the end of December 2015 I receive my bill and my water was R24 000.00 (What the Hell). This is a Actual Reading for 16 months. I worked out that my average water usage for a month is R400.00 so times that by 16 is far less than this R24 000.00. I went to Plumstead and was told they will investigate. They gave me a print out of reasons why the person doing the reading couldn't do the actual reading for 16 months. Reasons being there was waste,building rubble, snakes, meter number changed, meter flooded with water. None of these reason are true. The water meter is on Council property so if all these reason where to be true they should clean it. Don't they have a system or check on report cards. They better see that this mess get sorted soon.