hmm right. Also the e-ticket says:
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TICKET IS NON-REFUNDABLE. SUBJECT TO CHANGE FEE AND FARE DIFFERENCE ON CHANGES MADE.
CANCEL BY FLIGHT DATE OR RESERVATION WILL BE CANCELED AND TICKET HAS NO REMAINING VALUE.
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When I called their customer support, the lady said if I don't turn up, the ticket will be automatically forfeited at midnight, and no other chagrs will be applicable to me.
These rules are not 'easy to understand' as they are not well documented. e.g. CANCEL BY FLIGHT DATE OR RESERVATION WILL BE CANCELED AND TICKET HAS NO REMAINING VALUE.....here why can't they add that there will be no more charges applicable to the customer. huh!
Any ways, forums like these and kind people who reply to the thread makes it easier, Kudos!