Very rude,insultive and arrogant

I bought in the store on the 19/7/14 and wanted to exchange and refund some of the items on the 20th/7/14,and when I got to the store I was assisted by Tumiso makgakga who didnot even greet and asked what I wanted? I politely asked for a refund and he told me he doesn't give refund and asked me why did I buy without checking if items were correct?i tried to be patient with him but he went on to say iam talking nonsense when I say ackermans gives 30 days as per terms and I was only back within 14 hours.There were two supervisors whatching and never bothered to say anything,He then continued to shout and say I must go to where I work and make rules and not in his store,i left and the person at the door noticed and said he will speak to him,I find this very disrespectful and upsetting,not sure if this is the culture instore?or what on earth was that all about.How do I shop again?or must I go with security as the guy might just hit me?time 16:07:32 cash sale ***5(last transaction.