https://community.bitsum.com/forum/index.php?topic=36999.0 https://community.bitsum.com/forum/index.php?topic=37002.0 https://community.bitsum.com/forum/index.php?topic=37014.0 https://community.bitsum.com/forum/index.php?topic=37017.0 https://community.bitsum.com/forum/index.php?topic=37018.0 https://wpforo.com/community/general-discussions/full-list-of-official-delta-airlines-customer-service-contact-numbers-in-usa-the-ultimate-official-guide/