There are options for applicants lodging visa application onshore or if they are sponsored by an eligible company or an eligible family who are citizen or permanent residents to appeal visa decision in AAT (Administrative appeal tribunal) under the Migration Act 1958 and Migration Regulation 1994.

After Refusal: https://www.aat.gov.au/apply-for-a-review

There is a strict time limit (ranging from 2–9 days) to lodge an appeal in AAT; therefore, it is highly recommended that you seek expert advice and provide him with the required evidence with your explanations in time.