Non-compliance by FNB to it's Rules & Regulations & Customers

I was charged a Fee on my Premier Credit Card on 27 Nov '23 due to a supposed prior omission by FNB (and which was not being charged to me for at least 5 years), I have been in communication with Customer Services, the Reversal Dept and the Personal & Private Service Recovery (PPSR) Division with no joy. It has taken 3 Phone calls and 3 Emails seeking an explanation and more specifically why as a client I was not given prior notification that I am now all of a sudden liable for a monthly fee. Note that as per FNB Credit Card Rules and Regulations, FNB are mandated to provide 20 days prior notice of any charges and fees changes to its clients which needless to say was not notified to me prior to 27 November 2023. I was also advised by the Customer Services on 11 December 2023 that a mistake, on the part of FNB, was made regarding the no charging of fees and that all clients impacted would receive a notification shortly. As of today, 23 December 2023, no notification has been received. Email received 22 December 2023 advised me as follows: "Please take note that the matter has been raised, and we were informed that the cost will be charged moving forward as this is a business decision." What more can one say - customer service to a client who has been banking with them for 45 years is non-existent and it seems FNB's rules and regulations DO NOT apply to themselves!!!! I seriously doubt that any of the affected clients have been notified. I wait with bated breath....... What a poor show FNB!!!