I phoned back. They said the taxes were $2560 for both passengers which was pretty much what I expected, so it was weird the first person said $1499.The flights are not secured until you have paid. Maybe it will all happen by magic behind the scenes, but others' stories suggest it won't. Therefore you have nothing to lose by calling back, getting them priced, paid and ticketed but everything to lose by not doing so.
I tried to pay, they got an error again. Tried multiple cards. She said she would have to call me back, I tried to say I would hold on the line but she wasn’t going to do that. Anyway seems I have two different people apparently looking into the payment issue now, the guy from last night and lady from this morning. Not holding my breath. Not sure what else to do?
Almost makes all this not worth it. Think I’ll switch away from Qantas FF after this trip.