bad attitude

During a wonderful family outing experience I decided to go to exact in Greenacres to make a purchase for my family. The cashier named Felleng called the next customer ( me). I greeted her and asked how she was doing. I then asked her if we get rewards on account or cash purchases. She cut me of. She proceeded to talk really fast so as to get the point across that she has no interest in helping me understand one of the benefits that I have as a customer. She continued to treat me like a dog .in the way that she communicated I felt like I was getting a beating for not going there already informed about the rewards.my family was taken aback , to a point where my brother asked her why is she like that on a Sunday and she just laughed it off. The Cashier was ********. She embarrassed me and laughed at me twice. I felt traumatised. I even forgot that I was holding another item that I needed to buy on my arm. As I was leaving her counter my brother reminded me that I have got a dress that I have not paid for my arm. I paid and got the second slip. The whole family shopping experience by one cashier in one shop, Felleng at exact Greenacres.there was no queue behind me so I was not wasting anybody's time. I am still confused about my rewards and I feel like I paid my way to a beating.