Hi Darren,
A fellow Aussie? This issue has happened to me twice, due to the license expiring and "all activation slots used." I share in your frustration as X-Avaition don't have fast customer support from my view and your product is rendered unusable and the $70 that you paid is not giving you your money's worth. I know X-Avaition do not want you to do this but since it has been 6 days, (I spent 9 days before sending another email) you can probably send another email as if they don't give any indication that your request has been noted by this time, they have almost definitely missed you email and you should be able to use your product! If they don't reply after a few more days (i.e 3) then there's a problem.
I hope that helps.