Security Questions headache

I don't understand how Standard Bank is still asking these security questions which reveal that their system is wrong. There have been so many complaints but we're still having to be asked these so-called security questions. I was asked questions for which I know 100% that the answers are correct but I have been told to either visit a branch (during a pandemic) or call back in 24 hours (probably to give the correct answers and be told that they are wrong). I don't know why there isn't another way for me to prove to Standard Bank over the phone that I am who I say I am. Standard Bank has an app just like the other banks, FNB uses the app to verify it's customers when they call, why can't Standard Bank do that instead of this clearly flawed method??