Bad service by call Centre agent

Today I had the absolute worst experience with Mr price contact Centre. I was told via the online chat to go into store for them to unblock my account which I did. I presented my store card as well as my ID. The manager at he store called the contact Centre. This agent that she spoke to asked her a few security questions, she then asks to speak to me and asks me the exact same questions, name, ID number, dob (as if my dob is not in my Id), address, credit limit, when I last paid the account, when I last made a purchase, where I last made a purchase, where did I collect my store card, how did I do my application for the account, what insurance I have on the account, what was the amount I paid last on the account, what my last installment was on the account. I got so frustrated because never was i ever asked so many security questions, I also checked that they only supposed to ask 3 security questions, but this women asked me more than 10. When I got frustrated, I mean I'm at the branch I have all my documents she then spoke to the manager and asked if I'm actually the account holder and started questioning whether it is me. She had so much attitude on the call as well. When she was asked for her name and surname she just gave her name and refused to give her surname because according to her it's private information (just after I was basically interrogated by her) which I don't understand how is her information private when she's working for Mr price. This is absolutely ridiculous to be treated this way as a customer and still given attitude. This was just after 1pm today. I really hope that call was recorded