Bad Attitude

I bought shoes for my son in JHB at Jet and then I had a problem with Jet as Emily the administrator told me that they will not exchange my shoes because I do not have a thank you points. So I did not understand why would they tell me she will not exchange them without any explanation whatsoever and she gives me attitude raise her voice at me. Keep in mind that this is an administrator someone who is supposed to be clients assistance for any queries and I ask her does she know what the back of the slip says if she tells me she will not exchange my son's shoes? She then tells me she does not know with attitude and then leave me standing there telling me she will not help me and not talk to me. I ask where is the manager and she says the manager is not here. she go to the phone makes a call while I am standing there and she have a conversation with a friend and me a \customer"wanting assistance i get that from Jet. Jet is one of the biggest retail shops and I am truly dissatisfied with the assistance I received and I have urged most of my friends and family to buy from that shop yet this is the service I get form them. What kind of a shop runs without manager or supervisor on site?"""