Trick questions or client verification

I have banked with Standard Bank for many years now but lately, they have changed their client verification method. Now each time I need to phone the Card division call centre, I break into a cold sweat. Their client verification questions are so tricky I am starting to think they are only meant to confuse you into answering incorrectly. How on earth does one fail one's own verification. How many people actually call the Standard Bank Card Division or any division for that matter a day to commit *****. It is simply humiliating, to say the least, when you are told you have failed the client verification test. This needs to be looked at and changed as not only does it waste one's time and airtime, it fails in achieving the goal of providing good customer service.