I guess if you have a passport from some country which - and I mean this with no harm intended - might raise a little flag somewhere in the risk department, and you reside in another country on top of that, then I think it will be long manual validation for your information.

I do believe it should be possible to be validated but it might take longer for you than for most other people due to you living in Australia but having a Sri Lankan passport.

Drop them a mail and ask what the status is and how long before you can expect your information to be verified.