But the problem is 10.2.2 applies only if OP has spoken with CX/KA staff and asked to be put on the (presumably) pvg-syd flight. In other words CX paid the QF fare but not reimbuse OP- correct me if I am wrong, i thinl that CX can get the QF seat at a much lower price than.. so it is a bit hard to get CX pay for the QF flight - unless OP argues that the 40+ queue make it not "within reasonable time", which i think is a difficult argument in front of a judge.

Can 10.2.3 kicks in to claim for refund?