Statement Costs

I am very disturbed at the fact that since 31 October 2018, i have been charged R25 for a Statement Cost, apparently this is a charge for Statements sent to me via Post, i never agreed to this charge, nor have i ever received a Statement via email or via Post. In December 2018, the consultant who assisted me on the phone had told me that there was a System problem and i am one of the clients that was being charged in error, it is now March 2019 and i am still being charged, and every time i call in for the charges to be reversed, i spend 15-30mins on the line (which is my airtime wasted)and i am assured that a deduction will not happen going forward, i am also promised that i will receive feedback on why i am being charged, still non to this 07 March 2019 day! Can someone please resolve the problem, because i don't understand how this is a system error, that continuously occurs