Rude cashier!

So once again I was treated badly in an Edgar's store today. The cashier (Sikelelwa Mbadu) in the century city store didn't acknowledge me as a customer. As I approached her till point she didn't greet me, hardly looked up or at me. I provided her with my store card she screamed "swipe" I got it wrong as I am not used to swiping my own card and she then took the card out of my hand and swiped it and showed her annoyed she was by me. She gave my card back and a few moments later she once again abruptly screamed "last 4 digits" obviously I didn't understand what she was asking as I have never been asked this before, she never explained that she needed the last 4 digits on my store card to proceed with the purchase, she just continued to scream "last 4 digits" at me quite a few times before I asked if it was sent to me or if she is referring to my actual store card. I understand that an email was sent out to all Edgars customers informing us of security changes but I haven't been to a Edgar's store since the last time I was treated badly in your Mitchell's Plain Jet store so I didn't know. The problem with the Edcon group was and still is your customer service is non existent. The staff is rude and ill trained. Today was my last time shopping at an Edgars store as I refused to be treated in this manner. Why is it okay for your staff to scream at customers? They are not doing us any favours. I am utterly disgusted at how I was treated today by this rude cashier. And I DON'T WANT ANOTHER STORE MANAGER CALLING ME TO TELL ME THAT I AM RIGHT AND THAT THIS IS NOT HOW YOU TREAT CUSTOMERS BECAUSE CLEARLY IT IS!