I emailed them about this and they said just start with the General 3 step process from Chapter 3 of the Aussie Speeding Fines book and drag it out as long as you can that way.
Chapter 3 has the exact letters you need to send you jus replace the sections in blue and red with your details
If they still don’t drop it – which they really should, just elect to take it to court, where, again, it should also be dropped.
Everything you need is in that booklet and its resources CD
Im in the process of this myself