Woolworths Century City

On Monday the 13 I was at Woolworths in century city and I went to exchange my items without a slip at the customer service. The lady at the till called a supervisor who his name is Keanen he told me that he can not exchange my items because they are a new stock. I did not understand the way he spoke to me and left with an attitude we did not even finish the conversation because I still don’t understand why items can’t be exchanged even though they are new stock. I am not satisfied with the way he handled the matter and still left me without answers. It doesn’t make sense that I can’t exchange because the items are new stock.