Call Centre Security questions wrong

Any call center in my opinion in South Africa is a waste of time. You call and call with no success. I have had the privilege to deal with standard bank call center and on about my 5th phone call to them i.e. they don't pick up there phones I finally got through just to fail their security questions for the 100th time. The info they have is outdated or unclear i.e. do you own property, No I do not but my company does. The call center agents do not know what to say. Please note the call is about my company so hence my answer. Once failed you are refused to speak or escalate the call to a manager. My next step was to lay a complain online and guess what. The complaint system fails when you submit. So after spending time on writing your complaint there is nothing. The message just says, visit your nearest branch. The next day I visited the branch just to sit in a que for nearly and hour. Once I was helped the customer service representative sent me the statements just for me to see it does not contain what I requested. I requested 12 months statements and not 3 months. I then asked for the bank manager to complain that their service fails at every level. When I entered the bank I asked for the bank manager and once again was ignored. I complained and explained that it is not acceptable service and the sources they are using has the wrong info to which they said they can do nothing. Nonsense the made the mess and it is not working. Fix it, tell me where I am failing so I can contact the relevant credit bureau. Although it is their problem not mine. Fix the mess you created.