If your lender has not agreed to a hardship variation, and you have been unsuccessful going through the Australian Financial Complaints Authority (AFCA), you may be able to keep trying to negotiate with your lender before they start legal action.
However, if you are not going to ever be able to meet the repayments on the loan, it might be better to try to negotiate for a hardship variation to give you time to sell, rather than asking for a variation that isn't realistic in the long term or trying to stall the bank from taking action.
You need to be realistic about your long term financial position, consider all options and decide what is suitable (or not suitable) for you..