Terrible service or lack thereof

I have absolutely had it with FNB! Seems like writing a nasty complaint in the only way I will get your attention. I closed my account for many reasons and the lack of service is one of them. I have tried to call you numerous times but the line is constantly busy or bad signal (on your part) or the system is down. How your system being down is my fault is beyond me. I tried to cancel my account on the 28th of October, your system was down so my request was never done, again not my fault or problem, tried numerous times are that whilst dealing with extremely rude FNB representatives, only over a week later was it successfully canceled. I tried to get my credit card account details telephonically since the app blocked the account number (yes, blocked, the lady who tried to assist was even shocked) in order to do a payment, the account details you gave me, after confirming twice, were incorrect. I could not pay my credit card, I then finally found a way to create a debit order from my new account to FNB, you did not debit the amount and now im charged with interest? Exactly how is that fair??? Please go back into the logged calls, if you actually log them anymore and see i tried to resolve this but COULD NOT!!!!