I am of the understanding you can reapply a year from the day you sat the selection tests - I just resubmitted my application a couple of days ago after not getting through the interviews.
Im curious to learn how you managed to find out how you'd done on the interviews- when I rang them back in March this year they said it was not their policy to give feedback anymore so I was left in the dark on that one!! Have they re-introduced giving feedback this since then?