Dear customer, when you have requests such as incorrect product, size change, product change, you will need to create a change request by getting help from Trendyol support assistant. Afterwards, we can make the exchange when you send the product to us with the exchange return code (in order to satisfy the customer at a higher level for the exchanged products, we try to send an extra gift product along with the product when the product is exchanged, sir, we have plenty of gift products available) We wish you healthy days. You can do the same process for refund, sir. You can get help from Trendyol support assistant for the return code, then you can create a return code and then you can return the product. I wish you a healthy, peaceful and happy life and thank you for your efforts. (Dear customer, if you choose other as the return option when providing the return, it will make us happy. Because when you do anything else, our efforts and scoring are wasted, thank you.) Or you can get a refund by getting an aide code from the trednyol support assistant, sir.