Unable to reach FNB servers from overseas, FNB refusing to assist

I am overseas and for the past 24h I have been unable to access my online banking AND FNB app. After making multiple attempts from different devices, different internet connections and multiple internet service providers, the FNB servers are UNREACHABLE. After having spent 30 minutes on the phone with an online support assistant, she refused to understand the issue and would not allow me to finish my sentence, claiming that FNB is 'not responsible for poor internet connectivity'. I tried to explain that there is no issues with my internet connections, as I am able to reach the login pages of every other bank in South Africa, and that I have tried to log in from multiple service providers, but the FNB servers are simply unreachable. I see this as theft, as FNB are denying me access to my money, and refusing to assist me with the issue.