FNB freezes accounts without warning

*** FNB - simply freezing a person's account with no warning????? Asking to confirm private details on the App - WHICH I DID - but account still frozen! Phone call centre, lady says "part of our ongoing bla bla bla!" I have been a client for over 20 years - never had an account frozen! I need to go to the doctor, I need to feed my workers - TODAY! Cannot do any of that if my cards / ATM / eWallet works - ***!