Just been with CS asking if I was to change my return trip ex-SYD to depart from MEL instead;
They claimed 'no seats' are available, but availability on EK405 shows:
F4 A0 J7 C0 Y9 W9 M0 B0 K0 H0 Q0 L0 T0 V0
He even went on to say that the flight is closed!
Interesting, hmm..