METSIMAHOLO ACCOUNT OF R39912-0.

Good day. Yesterday I received an account from Metsimaholo Local Municipality for the amount of R39912-00. I went to their office. They sent me to room B11 were I spoke to Sibusiso that asked me if the account is incorrect, and I rep****: Of course. He send me to room B7 were I spoke to a lady with the name of Moipane and she send me to here supervisor in room B5, Mr Mokoena. He explained that we (me and my husband) paid the incorrect amount (they have charged us incorrect) for the last 10 years but according to the law they are allowed to charge us the correct amount for the last 3 years. I usually phone in my meter readings - a 4 digit number. If I gave them 5 numbers, they only said they work with 4 numbers. This 4 numbers appear on my bill. Mr Mokoena told me yesterday that I should check the account, and will see 5 numbers and I did not querry it, but there is only 4 numbers. They have a guy that double check the meters every month, and never they told me that there should be 5 numbers. They also never ever ask for a photo of the meter reading. Mr Mokoena told me yesterday that I can pay the R39912-00 in 5 years, R600-00 per month. Why should I pay for a problem they only discovered this month. Today I told Mr Mokoena neither he, Sibusiso or Moipane wanted to help me yesterday, now I will get someone to help me (HelloPeter) and he said that is fine. He can assure me I WILL PAY OTHERWISE HE WILL MAKE SURE THEY CUT OF MY WATER. Please help. Why should we pay for mistakes they make?? I know hello Peter will help, in the past Hello Peter helped me with another problem. Thank you very much in advance. Jenny