Disappointed Service as a Private Client

As an FNB client, I contacted the call center in which the automated verification was not working. Hence I had to answer 7 questions inorder to verify myself to the lady agent. I didn't get her name as I don't recall her introducing herself at the beginning of the call. I enquired why so many questions, she answered that it was due to me answering 2 questions incorrect, but the rest of the questions were correct. She still continued with the questions. I felt I was treating like a ********! I questioned it and the lady mentioned that she can ask upto 10 verifying questions dependant on her discrepancy! As a private client, you should not be treating your clients like *********!! You should have a standard as to how many verifying questions to ask and not leave to the agent to decide!