Https://oig.dc.gov/sites/default/files/webform/rafp_online_complaint_form/_sid_/full-list-of-united-airlines%C2%AE-customer%C2%AE-usa-contact-numbers-a-step-by-step-guide.pdf https://oig.dc.gov/sites/default/files/webform/rafp_online_complaint_form/_sid_/full-list-of-united-airlines%C2%AE-customer%C2%AE-usa-contact-numbers-a-step-by-step-guide.pdf