incorrect billing

Since the begining of this year I'm having problems with midvaal as they dont always update my account ( ********** 3)payments timeously and they are so quick to say i'm in errears and this is not only unfair to me as a south african citizen and a consumer since I always honour my payments but instead of bieng i'll treated to an extent as If i'm a ******** whose avoiding to pay his dues and whenever I call or e-mail its like I'm bieng a nuesense and they doing me a favor my account is always accumulating debit interest charges since they dont update it intime and when they do they dont write off the interest which has accumulated due to their incompentence and ignorance however I as a consumer have to face the consequences of their faults and each time i query a debit balance I recieve a copy of my stateme but titled duplicate which is in credit however when i recieve the new statement its was left in debit and theres no trail of my credit balance and my monthly payment were updated late and also they only send us statement when they feel like it or if you query it they just send you the duplicate statement to keep you quiet and its the same run around each month which I feel its utterly unfair since these people get paid to do a job of which they are not and to make it even worse its my tax money thats paying their salaries but they get away with treating me like animal and intern get applauded an ranked the best municipality i the country while they continue to victimise me I really need help with this something got to give where is the justice there where is accountability where is service and humanity