Overseas Experience
You may like to look at the website www.moneysavingexpert.com,
a U.K. site that amongst other things mentions that courts award 8% interest
on top of reclaimed illegal fees as the norm, so demanding and being paid
8% extra even without going to court is now commonplace.
The Westminster legal system in the U.K. is the one under which
Australia operates, too, so demanding interest, as I suggest, should be
viewed as quite unremarkable.
This site even mentions the legal process of bailiffs being sent in to
banks (see
article from UK's Daily Mail below)
to seize goods or monies to the value of your successful claim, should
the bank, having lost a court case, seek to not pay up.
Reclamation of excessive fees/charges has been going on in a substantial
way since 2005 in the U.K. and the site states that possibly 100s of thousands
of refunds have been claimed.