FNB not communicating or fixing the issue

I love FNB, they have always given me great service as a Premier client. However, I am getting little to no feedback from them about an ongoing issue. I have started working abroad recently and organized everything (had to do it twice as the first time nothing was done) to have my OTP sent to email instead of sms (as I will not be in SA, I will not receive smses and signal is poor where I am - we make use of wifi). They escalated the issue and apparently changed the setting. This is not while using the app, it is for online purchases. However, I have also tried to have my InContact messages sent to email and that is not working either. I am now stuck abroad and after many unanswered emails (they ask me to phone them even though I have told them to either phone me on my overseas number or communicate via email due to bad signal). Then after one communication, I hear nothing further. Please help?