Coupons can only be applied at the time of order placement.
If a coupon was not applied during checkout, it cannot be applied after the payment is completed.
In this case, you may cancel the entire order and place a new one using the coupon or promotion code.
To avoid this issue, please double-check that your coupon is properly applied before making payment.
※ Order cancellations are only possible when the order status is still "Payment Completed" right after placing the order.
※ When an order is canceled, any used points or coupons will be automatically restored to your account, as long as they are still within the validity period.
If a coupon was not applied during checkout, it cannot be applied after the payment is completed.
In this case, you may cancel the entire order and place a new one using the coupon or promotion code.
To avoid this issue, please double-check that your coupon is properly applied before making payment.
※ Order cancellations are only possible when the order status is still "Payment Completed" right after placing the order.
※ When an order is canceled, any used points or coupons will be automatically restored to your account, as long as they are still within the validity period.
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