Government mental health services in Victoria are located in hospitals. These services are called Community Mental Health Service or Continuing Care, Clinical and Consultancy Service (CCCCS). These groups can provide an initial assessment and help for your problem or can refer you on to other services.
Search for the Community Mental Health Service (or CCCCS) in your area at at http://www.health.vic.gov.au/mentalhealth/services/index.htm