Welcome to the unfortunate world of not being able to (most of the time) get consultants who really should know and be able to help with this stuff.
One shouldn't need to have status to be able to get a consultant who can :
#1 - See the reward seats you can see online (and then depending on this),
#2 - Change seats / flights for reward bookings, irrespective of whether it is part of a OWA or not.
It's ridiculous that only Hobart and Auckland "co-incidentally" have full awards visibility and availability including what's shown online. I had a well documented business OWA experience last year in which I called Qantas well over one hundred (yes, 100+) times to get some simple changes done.
ie. Initial booking - only JQ economy was available so I booked it to ensure I had a flight home. Then kept checking the Qantas website almost daily to see if there were any newly released award seats. Found a QF business one - great! So I call up and attempt to change it, only to be told any of the below BS responses:
- The award seats showing online are for new bookings only and can't be added to your existing booking (The most common response)
- There are no award seats available on the day you're requesting for (even despite me looking at the very award seat I want on my computer / phone during the call!)
- We only have revenue / commercial fares available for the flight number you're looking at
- You are not allowed to change, only cancel altogether for a refund minus a cancellation fee
Sometimes it took 15+ calls just to get a change done, and sometimes I had no luck at all so I gave up for that day.
Then a few days / weeks / months later when new seats show up, I try again and again most of the time without much luck. Incredibly frustrating.
I know it's hard to get a OWA itinerary (even a 132.4k economy one) at the best of times, but you just have to try to do what you can online yourself, without having to call up to get changes done.