FRUSTRATES WITH STANDARD BANK

I am hopeless at this point all I need to do is access my banking app. I am currently living in the United States of America and I do not receive sms to my South African number, which my OTP is sent to. All I need is for Standard Bank to change that so that I can receive my OTP on my email, so that I can access my banking app therefore I can access my money. I have tried everything to waiting on the helpline to emailing ***. I am promised to be called back and 3 weeks later I still have not received a call. I get one email response telling me to do the same steps that I’ve told them doesn’t work and I just do not receive another response after I tell them that it doesn’t work. I am so unsatisfied with Standard Bank’s customer services. I have not been able to access my money in nearly two months. I do not know what to do anymore!!