Cashier bad service

My name is Nunu, My number is O*** n the 6th of June I went to PEP stores, when I arrived at the till I got such horrible service from Agnes Ngoma. The cashier was impatient and so rude, normally at other stores they ask for that+App that they introduced. So when it was my turn the sales lady didn't ask for the App or enquire of I have activated ated it not, she just ran the item and when I asked her please add The +App, she refused saying I should have told her before she was done that I wanted to use it. When I asked why didn't she 1st request it before it's done she said its my responsibility to let her know that I wanna use it. She did the same thing to the customer that was in front of me, and the manner sher said it was totally off. At any other store they ask for they loyalty card but this time I had to inform her that I wanna use. I was appalled by the way she spoke to me. No regard of what I wanted what so ever. PEP should not introduce such services since their staff members are not will to help us use it. I left very disappointed and lost out on my rewards coz hse wasn't willing to assist to that extent.