To escalate a problem with Expedia, start by contacting customer service at 888-431-2039 for immediate assistance. If unresolved, ask for a supervisor or manager. You can also reach out through Expedia’s social media channels or email their support team. Document all interactions for reference during escalation.
Source: https://bcpportal.bcpcouncil.gov.uk/forums/general-discussion/663e2977-e19d-ef11-95f5-6045bd11e914