What should I do if the United coupon is not refunded?

You can contact the customer service of China United Airlines or the customer service staff of the local United Airlines service center. In case of non-refundable United Airlines coupons, you can contact the customer service staff of China United Airlines or the local United Airlines service center to find out whether there is an applicable change or refund policy. Some travel coupons may also have corresponding flexible use policies, such as allowing to change the flight date or destination when redeeming. It is common that United Airlines coupons are non-refundable. According to the usage rules of coupons, once they are used or expired, they cannot be exchanged or refunded again. United coupons cannot be refunded or transferred because they are invalid or expired.