There are a number of ways you can lose your licence. There are a number of ways to protect your licence too. The Police and Courts do not deal with demerit points; that is a job for the Roads and Maritime Services (RMS). Nevertheless, you can apply to vary or set aside a licence suspension to the Court and the RMS is the body that will almost always prosecute it.
Setting aside and varying a suspension is not unlike a sentencing hearing. We need to show a need for a licence. The hard part is that everyone has a need so we need to delve deeper into the details of your particular need and articulate it carefully to the Court.