Shocking customer service with a don’t care attitude

I was at Clicks Westgate on 26th and I’m just lost for words for the shocking attitude I got from the teller Wendy Linguwathi. Usually I give the tellers my card number saved on my contacts as Clicks card number.My phone screen was very well lit and bright enough for her to read it out a metre away. She asked with attitude “ what is this ? “ I explained to her that it’s my card number - can she kindly process it for me manually.Still with an attitude to make enough an elephant to feel so small she responded “ I can’t process it” .Noticing that I’m not going to get far with her , I asked for the team leader “Mpho “ but was then assisted by Thulani who introduced himself as the store manager. He explained the process and did not even know when communication was sent to clients about the change, He neither even acknowledged my agitation with the attitude of his teller. I got into the store happy and left with a bitter taste and chilli in my eyes and without a discount or point on / for my purchase . I still do not know what he was trying to explain. Eloquence is one pre-requisite of being a leader. Secondly talking to me in zulu as if I was zulu? ****$$&&@ ********** is this store so different from other stores who can process this transaction? I wonder if I should continue visiting this store to be reminded of such a ********** service!!! I may be 1 in 500k who visit the store but surely their service is shocking and attitude is just rotten!!!