App and online banking says my details don't exist

Got a new phone and migrated everything to the new phone and then tried to get into my FNB app and it says my details don't exist. I try log on via the web base log in and get same issue. And the web do not even let me search for a contact number or any sort of service support number or email. Yet old my old phone I can log in via the app. FNB what is going on?