FNB banking assistance Needed in China Please

Good day. I am a South African working in China. I have purchased a new phone and I am trying to access my banking app which I can't do without. I am trying to get hold of somebody at FNB to help me. I have sent several emails and have had no response in a week. I get to a certain part in the process of adding my app and then the OTP is sent to my SA number which is of no help to me as I cannot access it. I have mentioned this in the email and requested that the OTP be sent to my email address and have had no response whatsoever. Can somebody please help me. I have also provided my Chinese phone number and nobody has contacted me. I urgently need to communicate with somebody from FNB please. Much appreciated. Michelle King