Municipality milking us for money

over a month dealing with a complaint with the assistant direct Glenda Skosana and the Director Arther Mbisi, I have showed them proof that I paid the deposit AND monthly installment for August 2017 as I received my invoice in April 2018 stating that I owe a deposit (9 months later) I have given them proof but they say that the deposit was my usage then when I ask what about the "usage" amount of R4307.78 which was also paid in August 2017 they cannot give me an answer, when I ask for proof of my usage for the month as I could have never consumed R6223.78 water and lights they are refusing to provide me with the information, I was advised that the municipality is singling out victim and milking us for our money and now I am a victim of this, 2 payments was made in the month of August 2017 they sent me the statement but when questioning what each payment was for I do not get an answer, on a separate incident I am waiting over a year for a refund that they owe me every 2nd week when I query this they say another two weeks, it has been 2 weeks for the past year, these people are so ***********, never willing to help, force us to come to their offices and when we do they give us a reference number to say all will be ok but the issues never gets resolved, when you call the contact center you hold on for 15 minutes and more and then your call gets dropped. this is incredibly ridiculous , frustration, unprofessional and *********** but to get service like this from a Director and an assistant director obviously the staff will follow, how will South Africa become a better country when people like this are in charge?