Always a problem getting info on your own account

So I call in to get my settlement amount in order for me to close my standardbank credit card. I call in and I have to go through some security questions, I give them all my details and they then start asking question.. I answer the question and boom! Authentication Failed, I try again and again it failed - I then call back (wasting my airtime after holding on for 20 minutes - and yet the same thing happens... I try again and after the 2nd attempt with my 3rd call I am successful (and no they asking me the same questions as before!!!) I am so sick and tired of this bank really - I've been with them for years and this is dam ridiculous...I have now paid my settlement and I will have to call in again for them to close the account and I will have to go through the same thing again!!!