Disrespectful and unhelpful cashier

I have just been plainly disrespected by a cashier named Rethabile Morolong at Pick n pay Lemontree, her attitude is disgusting, she was very unhelpful as one of the items I had was not reading on system and she wanted me to go get another one, she told me to my face that I was wasting her time as she needed to go (be it lunch or knock off) ,she didn't even have a name tag and refused to give me her name verbally but I figured her name is on the slip as mentioned above.