Billing read over 38days

Erratic utility reading days, latest 38 Days reading, based on the average water consumption per day I have been overcharged by some 17 kilo litres (31 days in January 2016) which equates to around R 1,200.00 overcharge taking into account sewerage.<br> With the latest charges implemented as a result of restrictions I have been pushed into a far higher chargeable bracket because of the excess days reading.<br> So unfair, this is ********, after complaining was told I must go into the office and report it, WHY must I be inconvenienced because of your/their incompetence in providing a reading that reflects the amount of days respective to that months invoice/statement.??