The RAAF might take you on, but not necessarily as an ATC... but worth following up.
Airservices used to have short-course MIL ATC conversion courses (on the presumption you were coming from the RAAF). Not sure if that is still the case, but in any case if you're already licensed as MIL ATC that would ordinarily be taken into consideration and would surpass "new school leaver type" fundamental qualification requirements. So, don't despair. Suggest you also try to speak to people over the telephone rather than simply trying to chase via email.