Help I Recieved Two Infringement Penalty Notice of Speeding Fines That I Did Not Do

I received an infringement penalty notice of two speeding fines that I did not do. The speeding offences took place on 6th and 19th September 2017 in Rangeville, Queensland, Australia. Take notice that I moved to New South Wales on the 15th of August 2017 and have been living here ever since and have not left the state since. A family member sold the car in my name on the 16th of August 2017, a day after I left. This means the new owner or someone they kno.w did the offence, so I nominated the new owner for the penalty and provided proof that I was in NSW, the penalty was cancelled and taken off my name. A couple days ago which is a year after the incident, I received a message that my license will be suspended, so I called. Apparently the fines have been reinstated in my name because the person nominated me back and that I cannot nominate them back (not cool!!). Now if it was like a $100, I would have said screw it and paid but the fines round up to around $500. Should I go to court in Queensland. Can anyone give me advice on what to do, what proof I need to provide, do I need a lawyer, should I talk to the new owner first, etc..
Please I'm desperate and I don't know people who can help me and this $500 is going to be from the saving that I have been putting to visit my brother in the Netherlands that I haven't seen in 5 years.