Complaint: behavior of store manager

Im disgusted in the way my situation at Foshini SouthGate mall was handled. I went to exchange a pair of shoes that was gifted to me. Tags incl never worn. But I did not have the receipt. The consultant explained that she'll be ae to assist with an exchange or a gift card. The manager was called to authorize and the interrogation started. Explained again and I was asked when,where,who,what,why. Call the person that bought it. I became a 46 yr old child infront of a store full.of people. I asked to speak to the manager above the one currently performing the interrogation. They called her, whilst im explaining the store manager starts arguing while im on the call. And obviously im also now in the same state of behavior. Because tell me when and how do you disrespect your superior and custo.er like that. Whether I was wrong or right. I wasn't eazy yes but since when do you tell a customer.er we have a high rate of exchange without a receipt and ppl want money. Am I that ppl did I ask you for money? The lady on the phone then says we can help you im sorry etc let me assist you by a refund, so.i ask how can you refund if I dont have the slip. A gift receipt or card will be fine. She speaks to a cashier. No we dont have gift cards. I provide them with one. Then we change our minds. Come to the store when im there. Why? The manager doesnt want to come out from the back to authorize. So its ok for me to travel up.and down spend money on transport just to get the help I deserve. Who will reimburse my travel costs? Im now am running at a loss with brand new shoes that I cant wear