Although being stuck isn’t your fault, it seems that no entity (airline or government) has the responsibility to solve your problem, so you’ll have to do it yourself.
Apart from going back to Australia, one alternative option is to travel to a 3rd country which allows Australians to enter (perhaps UAE) and apply for a Philippines visa there (if you qualify, check beforehand). This involves additional flight and hotel costs, but might work out better than going back to Australia and paying for quarantine there.
The traveller owns the responsibility for ensuring they have all relevant valid travel documents or ability to transit or enter into countries, either their destination or any transit stop along the way.
Airlines have no liability to the passenger for ensuring their documents are valid, or whether they actually have the ability to enter the destination country – what they do have is a liability to the destination or transit country to not present ineligible persons, and they typically get fined when that happens, but that liability infers no responsibility to the actual passenger.
You have two options – firstly, check what your travel insurance can do in this situation. They may be able to pay out for some expenses for example
Secondly, you will want to contact your country’s embassy or consulate in Malaysia – they may be able to repatriate you or otherwise help you out.
You may also want to seek help from friends and family, or try opening a GoFundMe and publicise your situation.
Credit:stackoverflow.com‘