The Information Commissioner can investigate complaints about the actions of Australian Government agencies. The Commonwealth Ombudsman may still investigate FOI complaints where that's more appropriate or effective (for example, where the FOI complaint is only one part of a wider grievance about an agency's actions).

Phone: 1300 363 992
Fax: (02) 9284 9666
Post:
GPO Box 2999 Canberra ACT 2601
GPO Box 5218 Sydney NSW 2001
TTY: 1800 620 241
Translating and Interpreting Service: 131 450
OAIC website
OAIC email link

To help you make your complaint:
OAIC's FOI online complaint form (note: this form is for FOI complaints only)
OAIC Freedom of Information fact sheets

For other complaints about Commonwealth government businesses, departments, agencies

For for other complaints about State or Territory government businesses, departments, agencies