Jason,
Ideally you phone your local Appliance Industry Association member and get him to repair the machine.
There are member lists http://www.appliance.asn.au
Otherwise…
You probably do not need to remove the bowl. You need someone -your local appliance mechanic or even your local motor mechanic to use an ‘Ezi-out’ or similar tool to remove the broken piece of the agitator holding screw from the agitator shaft.
The Galaxy is not so big you can’t get it to someone. Then all you need is a new agitator and agitator bolt.
BUT. why did it break in the first place? Machine overloaded? Shoes or something hard in the machine? A carpet or large rug?