FNB - login update problems.

Both my FNB banking App and on-line web login failed over the weekend and early Monday morning without any notification from FNB. Later on Monday morning the App forced me to create a new login name/password combination and then I was able to login via the App, but not via the Web. Phone call and app-chat have not been able to resolve. I have tried using the web interface to change my username and password. It indicates that the information I have supp**** is correct, but displays "No data returned from request" on final submission. - I see someone had this same problem some years ago. Not a happy chappy at the moment - FNB are letting their clients down - not the only problem this month with FNB.