Looking for assistance for a Star Alliance upgrade

[curiousm]

Hi everyone, looking to take advantage of the vast knowledge here. I'm looking to do the following...

have a flight booked on Air NZ London to Sydney (via HK), and trying to do an upgrade. can you please tell me if it is possible to do the following

Leave on 12/10 NZ0038 LHR - HKG, spend some time in HK then fly onward on 20/10 to sydney NZ0038/119 (change flights in Auckland). My questions are the following - is this possible, how many miles will it cost. Having some major problems with dealing with KF call centre with this.

To make clear, i have a ticket in economy and am looking to upgrade to business. As always thanks for any assistance.

[trooper]

A Star Alliance upgrade? So you ARE booked in Y or B fare classe right... as I don't beleive it is even possible on any others...

[curiousm]

yes i am. Trying to work out how many points it will cost me.