Hello
@SuePo and welcome to posting on AFF.
The ACCC says it is pleased Qantas has begun contacting its customers to tell them they are entitled to a refund for domestic or international flights cancelled or suspended due to COVID-19 travel restrictions.
www.accc.gov.au
Have a read of this linked article from ACCC. Without fully knowing your circumstances, especially dates etc, the ACC press release suggests that you might possibly be entitled to a refund (and yes, you will usually have to fight a bit to get one - Qantas default position seems to be deny, deny, deny). Some key parts of the press release are:
"
The ACCC was concerned that Qantas’ communications to customers between 17 March 2020 and 31 May 2020 did not adequately inform them of their right to receive a refund. In some cases, the ACCC considers Qantas’ emails may have encouraged these customers to cancel bookings themselves in order to receive a credit when many would have been eligible for a refund."
So maybe if your flight was purchased/cancelled in this time frame, you might be lucky? Anyway, I would still try talking to them with the ACCC press release as a guide and see how you go.
Also, your flight credit should probably be valid until 31 December 2023, even though when it was first issued it would have been for the standard 12 months. Check the link below and scroll down to Changes to travel plans- bookings on or before 28 February 2021
View information on what option you have for changing and cancelling your Qantas flight booking.
www.qantas.com
Also, look here for more details on how you can use the flight credit: multiple bookings for example to use up the value.
Find out about Qantas Flight Credits, usually offered on cancelled bookings and how to redeem flight credit online or via your local Qantas office.
www.qantas.com
This page also re-states that the flight credits are all valid to 31 December 2023 if for a booking made before end of February 2021. So it does look like you will at least get longer to use it and maybe you can go to Cairns next year or 2023! Also, please be aware that you get the value of the flight credit taken off the cost of new booking(s), not just a straight re-issue of a ticket. So if fares have gone up, you may have to pay more for the flight you eventually take.
Good luck