Never had to deal with them before. Just use trusted suppliers mate. Heres a few.
I always get paranoid when ordering off the internet, so I only use trusted sites.
I've ordered things off these sites, or their sister sites before. Its all good.
If you can't get hold of the suppliers then contact trading standards or your Aussie equivalent.
I help the best I can. Not sure why Breadfan said 9 posts? Is there an unwritten rule that only people with hundreds of posts can make a new thread or something?