My vehicle was accidentally registered for 1 years instead of 3 months as usual, so I asked for refund so that I could register for 3 months only. When they refunded they deduced some amount I was in the impression that was for the month registration fee. When I was driving in Adelaide I was pulled over by police and found out the registration was expired already about a month ago. Now I have been fined for owning and driving unregistered and uninsured vehicle in road. Can we make compelling case in court as I was not aware that the vehicle was unregistered and uninsured. I have evidence of that 1 year payment and refund of that payment, I am in Student visa and have never in such situation. Total fine is more than $1500, that's a very big amount for me. I would greatly appreciate the advice. Thank you!