Unbelievable Security Exposure

Last month a supplier single-handedly processed a R7k payment on Pay-Fast system through my account, the system that I (account owner) must input OTP and approve on the app before any payment is done. Somehow FNB allows suppliers to do it single-handedly without any authorisation from me. I was told that an investigation is underway by Catherine Morgan as how the supplier did that (so much for world-class security), that was the last time I heard from the security team. My emails went unanswered by Catherine and the Retail Service Recovery Team, clearly they haven't figured out how payment system that I must authorise was bypassed by a supplier. NOW, IT HAPPENED AGAIN. The same supplier has processed another 7k through my account. Not only did FNB not manage to figure it out but can't seem to be able to stop it. My account might as well be fun-fair for all at this rate. FNB I want my money back.