FNB banking app

Earlier today I went to my local FNB branch to change my online banking app credentials because the app did not accept my credentials after a long proses I was finally able to change my credentails only to find out that the app stil does not accept my credentails after this I phoned the app customer care line they did not put me thru to an operator who attemted to help me for a few minutes, the operator insisted that my credentails are indeed working ans then insisted i use all three of my attemts to type in my credentails which ended up blocking my device after I informed the operator that I did not want my device blocked on the app the operator then without warning or reason the operator then did not reply or answer me the line remained active for several minutes while I attempted to ask if the operator was stil on the line but with no success as the line was stil open I waited for an addisional 5 minutes on the line to see if the operator would make any attempt to answer me after waiting patiently for an aditional 5 minutes I ended the call after there was stil no reply on the line