No feedback on email query

I am currently out of South Africa and requested (via email) that FNB change my one time pin from my cellphone number to my email address as I am unable to receive the OTP via sms while out of the country. I need to transfer money from my FNB account and at this point I am unable to do so without the OTP. I sent an email to FNB requesting that they change my contact details on the 25th of April and received an email back stating that I will be contacted within 48 hours. I did not receive any response. I again sent an email requesting the same on the 28th of April without any reply. I would appreciate it if FNB can contact me via EMAIL as I cannot be reached via cellphone. My email address: [Email Removed]