CHANGE DEBIT ORDER DATE - ******** BILLING

I am so unhappy with the customer service/Accounts department. I called in 2 times today to get my debit order date fixed, because they have been changing it without my consent and charging me an extra R70 every month. the 1st consultant said she doesnt know why and she cant explain why they doing that and she cant help. The second consultant asked me to hold so that she can have another conversation with someone in the background without muting her self and she also couldnt help. I am sitting here being charged for the wrong debit order date and no one seems to care to assist me and rectify the error caused by CELL C!!! someone please do something!!