Bad Experience At Truworths

I had such a bad experience at Truworths Zevenwacht Mall today. I went to the store to exchange a gift my son had received from his aunt. We do not have the receipt but simply wanted to exchange it for a bigger item. The assist was so disrespectful, stating they cannot exchange it because they do not know how we "acquired" the item. It was as if insinuating that we could have ****** the item too. I told her I understand her concern but it was still in the initial packing and can see the items were not tampered with. This conversation happened in front of so many other customers. I felt so ashamed leaving the store. This has really been a horrible experience.