Bad customer experience ever!!

Hello Peter!! Yesterday i went to Pick 'n Pay, got to the till to pay for my items as well as getting cash back via the service called Mobile Money. Cashier was suppose to do the transaction at the same time as it charges you if you do it separate however she did it separately but i did specify before i provided the Wicode to her that i want to do it at the same time. Her and the supervisor gave me a very bad attitude without even apologizing as if i was the one who was at fault. Even told me that THERE IS NOTHING THEY CAN DO. While retrieving a new Wicode for the withdrawal which takes seconds, the supervisor then wanted to help the client behind me which i find very rude (customer avoidance). When i was finished and walked away they were both passing buck. When i was out of the shop i realized that the supervisor was following me, she thought i was working at the mall. Hello Peter id be very happy if you address this matter with the store.