Hopefully this is useful for others who are trying to cancel their cards (after points are posted).
So I had the card for a couple of months now, the 32K points are posted to QANTAS FF account and I rang today to cancel the cards. Girl on the phone said they can't do partial refunds of fees but tried her best to get me to keep the card till the next annual fee is due. I sad no thanks (as I am going to apply to other cards and want to reduce my coughulative credit card limits).
She then suggested I apply to transfer to a low fee card with no rewards, $30 annual fee and she said the pro-rated amount from the annual fee I paid for the platinum card will be credited to this card after deducting the $30 fee. I sad thank you very much and accepted this as it means I get most of the fee back minus $30. And the good news is the new card limit can be decreased to $1000. So once I spend the credit on this card, I will cancel it altogether.