Worst service ever

I went to Mall of Africa branch to buy a few items I needed. When I got to the tills, the cashier (Nqobile) rings my items and then asked how I am paying. I gave her my Woolworths card. She looked at the card and said she can't read the numbers so I have to go and do a temporary card. I refused because I have a card that works perfectly. I asked why she's not swiping the card and she didn't answer instead she called a supervisor. They then argued about my card being a temporary card. I told them I've had the card for a year already. The supervisor then asked for my ID which I have to her. They then disappeared for 15 minutes or so and then the cashier came back and swiped the card. I am irritated because I had to wait for long and still don't know why. Even after waiting for so long, she didn't ask if I needed a packet for my food items instead she gave me a slip to sign and watched me as I pack food in the clothing bag. I feel if they suspected I was a *****, they should have had respect and took me to a private room.