“To escalate an issue with Expedia, you should
first contact the customer service number,+1|805|330|40.56 or +1|888|829|08.81 clearly state the problem and your booking details, and ask to speak with a supervisor if the initial representative cannot resolve the issue. Escalation can also be achieved by calling a dedicated line, such as the one for supervisors at +1|805|330|40.56 or +1|888|829|08.81, or by sending a demand letter before considering legal action

Start by calling Expedia's customer service. The provided number is 1-855-EXPEDIA (1-805-330-4056 in the US).

For more serious issues, you can call a dedicated line to speak directly with a supervisor, which is 1-888-829-08.81.”