Indiscriminate frozen account

Why must it be FNB all the time. As a foreigner do I not the deserve a right to enjoy customer privilege. How do you freeze people’s account without contacting them and only making them find out when they default on debit orders and having me experience a decline transaction inside a store. I am only a victim and the ***** help desk isn’t helping situation. I can beat my chest and conclude that FNB is ****** and discriminates against foreigners. I was asked to send proofs which I did, after I sent the proof the lady requested for an affidavit which I travelled to the police station to get and I provided it. Now they don’t even know what else to ask for and wasting my time. Asking around I realize that this is a norm in FNB where they freeze foreigners account with the intention of accumulating all the funds to the bank especially if those foreigners are not resident. Management of the bank must look into this as it is abnormal and will only tarnish the reputation of any bank.