Billing not the same as the system

For the month of September I received a statement that has an amount of R-104.69. I called the customer care number asking why the statement shows that amount. They then told me that the statement on their system shows otherwise. They do not see that amount. So I send them a copy of my statement via email and the logged an enquiry and gave me a reference number, so today I received my statement for October and still it shows the amount of R-104.69. So I called again still the system doesn't show the amount eventually the lady who helped me got the amount on the system. I was put on hold and the the line got cut so I called again. The next lady couldn't find the amount I was calling about. So I asked to speak to the accounts dept and she, told, me that she is the account dept, so I asked to speak to the billing and she told me they do not take called, I then asked to speak to a manager or supervisor and the line got gut after holding for 5 minutes. My argument is how do they send you a statement that does not reflect on their system. <br>