OK, thanks ..... but I still don't understand. Here's my problem -
1. Me - I'd like to change this ticket please to an earlier flight today. I'll pay the $27.50 change fee plus whatever the fare difference is between what this ticket cost and the cheapest available ticket on the flight I'd like to go on.
2. QF - you can't. You cannot change that ticket on the day of flight.
3. Me - OK. In that case, I'd like to cancel this ticket please and receive a credit for what I paid for it, less a $27.50 cancellation fee.
4. QF. OK, here you go....This credit is good for 12 months (presumably?) and can be used to (part) pay for another QF ticket.
5. Me. Thanks very much. Now I'd like to purchase a ticket on this flight today please - what ever is the cheapest available.
6. QF. That will be $xxx please for this new ticket.
7. Me. Fine. I'd like to apply this credit you just gave me against the cost of the ticket. Here's my credit card for the balance.
*****
What am I missing? The end result is the same....