Flights were booked about ~5 weeks ago using a gift voucher and Jetstar credit card.
If relevant,
Purchased $5K of QF vouchers last Xmas and purchased ~$1K of tickets for a Broome trip.
QF didn't issue a new voucher for the residual, had to speak to support a few times and about 7 days later given a voucher id over the phone.
Went to book the flight online but had issues, spoke to support and they managed to book the trip for me using GV and CC
I can see the flights in both our QF logins and have made successful seat selections.