Water meter inspector not doing job

We submit monthly voluntary water readings and always take photographs of the meter, on 12 Nov 2018 we receive an SMS that the NMBM will be taking a reading to verify our submissions. Our photograph on 20 Nov 2018 said water reading 2969. On 07 Dec our account arrives with a reading of 3088 and a hefty account of R11,500. We immediately checked the meter and it was reading 2983 ... So it is obvious that the lazy bum never came to check the meter. It is of no use to fight and complain as the Municipality does not answer phones they just charge interest if you do not settle in full. At the moment the Ward Councilor is assisting to get this sorted and hopefully some jobs at the Municipality will be lost.