Non-Res status assistance

Been an awful experience with FNB.I was a student in South Africa but now I am working in UAE.They had no issue with pushing their charges on my account but the moment i made a deposit they red flag my account and hold on to my deposit claiming that my visa has expired, well obviously it has expired that’s why I’m not in SA.Upon following up with them they’ve sent me on a goose hunt from one department to the next until I reached the Non-Res department which is another *********** section of theirs where one person named Tsietsi Mogagabe informed me that they’ll send me forms to change my residence status and that was the last I heard from them.Please can anyone else assist me so that I can access my own money.