https://www.planete-citroen.com/topic/152561-how-can-i-talk-to-expedia%C2%AE-customer-service-a-step-by-step-guide-to-getting-help-fast/
https://speakerdeck.com/swgtfdefrgth/10-ways-to-call-british-airways-r-usa-contact-numbers-a-full-on-complete-guide