Rude consultant

i am very unhappy with the consultant who attended to my query, at Capitec Harrison Street, i am unable to download the capitec app, i went to the branch for assistant, The lady name tagged Verona told me that she does not know how to download on iphone i went on telling her that my cellphone banking also is not working she told me to try it as i was sitting with her i tried it and i entered a wrong pin, she said to me and I quote " mama you must read carefully" i told her that is not the right way to address a customer, she continued that i must read carefully when i asked her about the app on how we can do, she told me that she doesnt know. She was very impatient.