1. First right of repair under warranty by the dealer you bought it from
2. Have it checked by another mech to ensure fixëd "ïn a workmanship like manner"
3. and repeat ..... till satisfied !
4. When dealer says no more or F-off call the CTTT
5. Mediation arranged by CTTT (Fair trading)., - if you have a case.
Note: Read your Warranty from the dealer and what your entitled to under the applicable laws.
If it falls outside of your rights then suck it up.
As stated through out this thread - live and learn.
BTW - All states have a service that cost around $300 to carry out an inspection for you.
So after you have done your homework, taken some one who knows what they're doing and your still keen - Pay $300 and get a report.