Very bad online banking service

I work in Beijing, China and I am relying on online banking a lot. In July 2017 I requested numerous times that verification codes should be emailed to me instead of sent to my cell phone as I am not in the country. Apparently no SMS can be sent to an international number to provide a verification number. In November 2018 I received an email that stated that my online banking verification code will be sent to my email. I was able to do transactions until end of last month. I can not do online payments anymore because for some reason I do not get verification code e-mails anymore. Now I am sitting in Beijing and I can not do any online banking. I keep on E-mailing ABSA's RVN forensics department but they do not get back to me promptly. If they do get back to me they say they will phone me on my international number, but this does not happen either. If this matter is not sorted very soon, as in today, then I will have to close all my accounts with ABSA and move my money somewhere else. I basically have been dealing with this matter since July 2017, which makes the time span 9 months and still nothing has been resolved.