Sorry to break the news to you, but the fact that you "don't know" of something means very little.
Manunt was originally given an M-15 rating but the AG of the time appealed (not the game publisher) and it was then refused classification. No appeal was made.
Postal 2 is a prime example of a game which was refused classification and was not appealed.
Reservoir Dogs was again refused classification and not appealed.
Source:
http://www.r18games.com.au/case-studies/