Anyone has any idea, which organisation is looking after travel companies complaints in Australia?

I have just a complaint about Singapore Airlines in Australia. They did cancel my parent travel tickets from Melbourne to Egypt on travel day and reschedule travel two days later without any reasonable reasons. Food on plane was off with such bad smell. I had complained to their customer service officer: “Dianne” in Melbourne airport, and she was so rude with us. I sent complain to Victorian Consumer Affairs. They sent letter to us advising that they will keep this complain in records for statistics data, but they don’t have such power to push Singapore Airlines for any compensation. Anyone has any idea, which organisation is looking for travel companies complain in Australia? I lost two days from my work and I need to know where to go??

Please note I have already sent formal complaint to Singapore Airlines Australia... It's useless, and their customer service is not that friendly... Not only service and food were so bad, we lost money from delaying our trip which is not fair... Tickets are supposed to be legal contract and they should not breach contract or they should compensate customers... Any help within Australia agents??

Thanks,

Mina