亚航empty seat问题

亚航订机票以后收到升级邮件，于是就订了一排的空位子。但是最近收到optiontown的邮件，好像是说付款未成功。
Dear Customer,Have you missed your Empty Seat Option?You recently attempted to purchase our Empty Seat Option however, the payment did not go through successfully. We apologize for any inconvenience. If you wish to return and continue again, simply click make payment. We offer various convenient modes of payment; you can pay through credit card, debit card or Paypal.
求指导如何解决，信用卡账单貌似这笔钱已经出去了