Here's the place you can report all spam including SMS's.
I even have one stubborn company that after phone calls and emails they continue so I dobbed them in.
ACMA - Home page
Page on spam
ACMA - Spam & e–Security
This URL provides some free software to not only attach to your emails but it will send the details on to the the govt who in turn automatically build a database and try to nail the culprits.
ACMA - Reporting spam
And here's a handy website for scams
SCAMwatch home