Https://support.hammerhead.io/hc/en-us/community/posts/29729308895771--SIA-Policy-Can-I-cancel-a-Singapore-Airlines-ticket-within-24-hours-Get-Refund https://support.hammerhead.io/hc/en-us/community/posts/29729308895771--SIA-Policy-Can-I-cancel-a-Singapore-Airlines-ticket-within-24-hours-Get-Refund https://support.hammerhead.io/hc/en-us/community/posts/29729308895771--SIA-Policy-Can... https://support.hammerhead.io/hc/en-us/community/posts/29729308895771--SIA-Policy-Can-I-cancel-a-Singapore-Airlines-ticket-within-24-hours-Get-Refund