If you have no joy, spend the $1 and get a VIR check, see if there is a security on the car then contact the finance company...they wont tell you who owns the car or any personal details, but when they find out that LTNZ has f**ked up yet again they will contact there client and then they can contact you.
If that doesnt work, then depending on what part LTNZ have screwed up (if its put your details down as the owner of that car) get a "Motochek" of your car details, past and present around the same time as they put that car into your name and you might get lucky and find they just crossed the names over.
If none of that works, let me know what LTNZ have done and ill see if i can pull a few tricks........they dont call me stalker for nothing u kno