Incorrectly charged monthly account fees and FNB does not care

So disappointed with FNB's customer service. I was sent a pricing guide for my Encore Cheque account in July 2018. In this guide it clearly states that I will pay NO monthly fee when you maintain a minimum balance of R5000 in my Cheque account OR any FNB savings and cash investment accounts. I have maintained more than R5000 balance in my FNB Savings pocket for the past 3 months, however in November and December a monthly account fee of R115 was dedcuted from my account. I have emailed, called the call centre and visited a branch only to be told today that the pricing on my account was never 'updated'. You sent me the pricing guide it surely is not my responsibility to update my account. I want these monthly fees reversed as I cannot be held responsible for your lack of controls.