Bad service

Sunday 14th Oct 2018 I made a purchase of sandals for the price of R59.99 The cashier(ontlametse les****) had a chat with supervisor or it's manager I don't know after 2min she call us to help us. I thought she was busy as the usually say. She scan the shoes. Process transaction and I paid with a card. Sadly when I check the sleep the price was R79.99. And I asked her,why this is not R59,99. Her response was quiteness. And I asked her you know to charge bank how much,no response again,she call her superior without even apologising,what is ****ing me off,she not wearing uniform,no name tag,even superior didn't even bother to apologise. N they reverse the sleep n do new transaction n refund me R20,00 without even apologising. What is worse is after finishing transaction and I complain she is busy calculating the money in the till.i don't know was hard for her to stop and listen to me. This jet in bapong sucks with service. From seniors And what is worse every stuff behind the till is watching and no one says anything or teach each to learn to apologise.