Rude and *********** cashier behaviour

On the date attached on the invoice I went to boxer to buy coffee sachet and ****ins and was assisted by Miranda the cashier ,when I was at the cashiers desk to my surprised Miranda was so rude and speaking malice words with me.i asked the cashier y was she speaking in such a tone and harsh manner she never answered, instead she continued giving me the look as if I am disgusting her,she scanned my items and one them couldn't **** and shoved them.aside and told me it can't **** ,I asked him how is it not scanning coz I dont know anything about this,I am a customer ,she told me I have to pay for what is scanning coz she wants to assist other customers,I called the supervisor Charlotte to come and call her to order and assist me getting a code so I can pay and go ,Charlotte assisted to her best of her ability but Miranda couldn't keep her mouth shut ,she continued to talk to the point where supervisor asked her y r u still talking ,This behavior is unacceptable and I demand something to be done about this,I can't be ridiculed by a cashier whose suppose to asist me but makes me feel like I am an idiot,I dont believe you open ur doors each and everyday for such people like Miranda to give boxer a bad name