your authentication system is flawed

Whilst in London, Std Bank blocked my card for *****. Prior to leaving I notified the bank & was assured il have no issues. Getting that sorted out whilst in London was a nightmare. What is the reason that you employ private bankers? Iv had unauthorized debits go off my account. Brought it to the attention of my private banker, however she then wants to authenticate that she's speaking to the right person when she calls. She asks me about my overdraft facility, which honestly I dont know if I have, and if i did, I dont know the amount. Since I was unable to answer, process was stopped and I was told to go into a branch to sort out my issues. When there is real ***** happening, you cant stop it on my account, and when the client is using the services, you suspend their cards. Thank you for reminding me again why I should be switching banks. You authenticate the **** out of your clients, that is why when we do withdrawals at standard bank atms, it take 5 mins, but when we withdraw from FNB or ABSA, it takes 2 mins. why? still busy authenticating????:D:D Prestige bank account holder, but disreputable service.