You can cancel any flight booked through Singapore either online or with a live agent. Whether your ticket is eligible for a refund depends on what type of airfare you bought and when you bought it.
Can I get a refund on Singapore?
You can request a refund by either using the online platform on Singapores website or directly contacting their customer service. To initiate a refund, simply cancel your flight ticket and request a refund through the customer service number at Singapore 18887780341.
Source: https://twor.microsoftcrmportals.com/forums/support-forum/6e1d8100-f100-ef11-a73d-6045bd3fd1cb
