Standard Bank Security Questionnaire Stupidity.

I spend long periods on hold waiting for an operator or spent long periods in a queue waiting for a consultant. I recently phoned Standard Bank to make a temporary increase to my EAP limit, beyond what I could do on-line. They made the change, sent a confirmation email, but when I checked, they had not made the change. I phoned again to find out what was going on but failed the security questionnaire, because I did not know the EXACT credit limit on my credit card. (I told them I was not sure and that it was approximately R***. As it turned out, my guess was within 5% of the actual figure. Would it not be better if Standard Bank actually trained their staff to use some discretion?