Since you made a payment with your credit card, you can simply click the Cancel Order button if you wish to cancel the order.
However, if the product has already been shipped, you cannot cancel the order and you need to go through the return process. Please note that if you wish to return the product due to a simple change of mind, shipping and handling fees for both ways (5,000 KRW) applies.
If the shipping and handling fee for both ways is not enclosed, return or exchange will not be accepted.