Well I really hope it's only because you're in Australia and I've heard that's always a strange place to ship to, maybe give it about 3 more days and if there's no shipping confirmed for then messaging then probably would be a good idea, sorry :c
Don't worry too much, mine also hasn't been sent yet, remember that both me and you are in places in the world that they normally don't sell things to so maybe they are just having to do extra things for postage :)
Probably my British flag Connection V3 Tama.
(It was the one tamagotchi everyone was trying to get back when I was in Primary School and my parents ended up ordering it online for me, I felt so cool back then xD)