I just had a look, as I'm also in Australia, and I'm able to get onto their website. So it might be a problem with your ISP or just a problem at the time? (My ISP sometimes loses it's international connections)
As for contacting dvdempire, I can only suggest you email them again and be prepared to wait until mid-January for a solution, due to the time of year we're in. You might be able to find some more email contacts for dvdempire in the "shopping info" section.
With a christmas retail frenzy, international mail being chock full of parcels, and then all the holidays and staff taking their holidays right after New Years, everything is a total mess.
best of luck,
scipio

