Bad attitude

I was on my way to work, I needed R50 change, around 21:30 I asked the cashier, for change, I needed loose money, as I have made a withdrawal at an ATM. She said she doesn't have change, (loose money) I asked her what can I buy that's cheaper so that I can get loose money, she was chewing a gum, her faced looked disgusted by my presence. I really felt offended. I just left. We don't need this kind of attitude as customers, she needs proper training for customer care service. One of the petrol attended was standing with her talking. Incident hours 21:30 date 02 Jun at location :Polokong Engen Petroleum, golden high way, near to golden gardens. This is the only petroleum station near me and I use them all the time, I'm so disappointed.