Sorry to hear that. Cheer up man, you can still re apply later.
I failed cx stage 1b in dec 2013, probably in the interview part. And I did my ka initial test yesterday, not confident to pass it as i did the maths part awfully.
For your parents sake please hide your disappointment. They will be relieved and pleased to see you pick up after failure.
My regards to your parents too.
Wendy