In Reply to: Just go into... posted by gator on Thursday, 15. November 2012 at 13:16 Bali Time:
Just go through Manage My Booking.
Not only is there a fee, but you lose what you paid for luggage and food, as well you have to pay the difference between the old and new fares.
When you reach the payment screen, you will have to work out whether it is worthwhile.