Worst service

Today I went to the Fores**** Woolworths food and requested to buy from my account. I was then told by the consultant to swipe my card for points and it worked but she then told me that I can’t use it to buy as she can’t clearly see the numbers on the card. I have to go get a new card. I then told her that I can confirm and show proof that the account is mine if she needs that- she then called a guy by the name of Luyanda (assumed that he’s the manager) whom she told she won’t be assisting me as she can’t see the details on the card. I then asked her why as I can show confirmation that the card is mine. She said if the card doesn’t swipe she has to type in the numbers manually I then asked her what if it swipes- she still maintained that she can’t help me. I am very disappointed and infuriated by the service received as I have been using this card at Woolies stores and no cashier has ever told me they won’t assist me because they card see the details on the card.