FNB no service

I've been trying to get support from FNB premier services for over 2 weeks. I called the number on the back of my card, I tried chatting online and emailing. Nobody wants to assist me and keeps telling me my device is not verified. My device is listed twice under the devices so it's a FNB issue. I've been trying to apply for a credit increase on the app. It gets to a screen where it says creating my profile during the application process then freezes. I've tried doing it on the pc, it gets to a screen where it gives me a quote, but no way to accept it. And now it simply declines it so I assume each of the times I app****, it did a credit check and because of the multiple times I tried and failed due to the banks systems not working, now it looks like I app**** for multiple loans where in fact it's because of the banks systems not working. Terrible, terrible service and it's supposed to be Premier?! I told the person I was chatting to to call the phone number on the account, surely that's secure because they call a verified number, mine. But no they don't call international numbers, so why have a registered number then of it doesn't serve a purpose?! They tell me to go the nearest branch, I'm in Aus and can't do banking because of your incompetence. There is no nearest branch!!