Rude cashier

Cashier rude. Speed point not working. Only found out when she wanted me to hand over cash which i did not have. When i suggested that she needs to tell customers in advance before scanning, she just fought with me. Telling me that: it is the same to her, as it does not affect her in any way telling the customer or not before or after scanning. She wanted to know how does it negatively affect me. She was rude till i walked out. Rage in berea centre durban.