To complain to Ｅｘｐｅｄｉａ, you can first try contacting their customer support team at +1↔ 855 ↔ 509 ↔ 3859 OR ✈️1ー8 5 5ｘ5 0 9 ｘ3 8 5 9 (US) (OTA). If the issue persists, you can formally escalate it by requesting to speak with a supervisor or manager.