FNB refuses to assist or even engage with clients

My FNB Premium Account was frozen due to a misunderstanding and a default on maintenance order and this has been resolved between myself and the complainant however after countless emails sent to FNB requesting them to unfreeze my account FNB still refuses to unfreeze my account, we have sent mails to FNB including the maintenance officer requesting them to close this matter as we have resolved it however our request is being ignored. I also realized that FNB has been providing the complainant with the activities happening in that account, "deposits" "balances" etc and I fail to understand why as that is invasion of privacy especially after the complainant and I have reached an agreement, FNB has no right whatsoever to disclose such information about my account, this is violation of privacy and with POPIA Act coming into effect I don't think what they are doing is allowed. FNB is not doing me any favour by unfreezing that account as I am not banking for free, I am paying bank fees and charges however if this means we have come to an end of our relationship then so be it, I would just like someone to tell me if they will unfreeze my account or not so I can move on with my life and stop waiting for for that account to be unfrozen. If this matter cannot or will not be resolved then can FNB guide me on how to go about closing that account for good so I know where I stand if that's not too much to ask for, my life is on hold because of all this. And if I hear that FNB has been disclosing my account details and info to anyone again I shall be seeking legal advise.