I see HFV6's regularly with lunched main bearings, and in 100% of cases servicing is late or missed. Conversely, I see them regularly with 200,000km+ pulled apart for maintenance (repairing oil leaks etc) and with good service history they look brand new.
If you fail to service your car correctly you deserve to have a big repair bill. I've seen expensive repairs rejected even within warranty because some retard #### spends $35k on a car and won't spend $300-$500 every 9 months/15,000kms to service the ####ing thing. I had one in recently that had approx. 25,000km and 18 months-2 years between services and couldn't understand why he had to pay for it.
So if your engine is lunched and you service it late, it's your own damn problem. Pictures such as Sabbath's are painfully common and owners just don't understand how it's their fault when they start having engine dramas. I'm also starting to regularly see it on Cruze turbo's that go 25,000km between servicing (the first thing they do is lunch a turbo because sludge blocks the oil feed lines).
It's also important to note the OP states a location of Auckland and hence, being in New Zealand, Australian consumer laws don't apply to him.
At any rate, good luck arguing consumer laws when you haven't carried out prescribed maintenance in accordance with manufacturer requirements.