What's wrong with FNB

I am an Fnb client, currently overseas and am having so much difficulty with FNB banking app. A simple thing as changing your password on the app is not being actioned. I receive my OTPs but when I go to the page to enter them, the system bombs out saying "System unavailable, try again later". It's now more than one hour as I write this. I previously had a Chat option to contact someone at FNB Chats but since I cannot log in, I can't even Chat to a banker. I've had problems to log into my app since 5 days now. I've contacted a private banker in SA who has helped slightly. This is not the service I expect from FNB. Extremely frustrated.