o'neill is a fucking charlatan quack. what he does to people should be illegal. soulless bastard with a lot of vulnerable people's blood on his hands if you ask me.
please seek a second opinion - a lot of doctors think those things are dangerous and unethical.
try the wa drug users association (i think they're called?) i'll see if i can dig up some contacts for you.
i don't know what your options are once they're in you, but it's not cool, especially against your will.
edit - ok, if you want some advice on this subject from local people who are interested in harm minimisation for drug users, you can try the
WA Substance Users Association - ph: 08 9321 2877
http://www.wasua.com.au/
i'm pretty sure there are heaps of medical people who disagree with o'neill's methods in perth, so if you want different treatment, there are probably a bunch of other people worth contacting.
it's a really invasive, dangerous way of treating addiction. there are much more compassionate options which you should have the choice to try. after all, it is your life - and your body.