Failure to assist me with a refund,because I did not have a receipt but the shoes were still in a box and also have a price tag

On the 19th of December I visited YDE in Gateway to purchase a pair of shoes.While in store o was with a friend of mine by the name of Sanelisiwe she also came in to by a pair of sunglasses.so I had cash on me and she was going to make payment through her bank card.she then said I should give her cash and she will make payment using her bank card and so I did.Then today(29th of December) I went back to the same YDE in Gateway to get a refund coming back with the shoes still brand new but without the slip.The cashier then called Nelly who said she was an assistant manager and told me they can't help me without the receipt,I must bring my friend's bank account statement which I told them they were in the Eastern Cape.The assistant manager then told me that they can't help me.