Rusty discs and faulty steering box

Suzuki NZ, who I originally contacted, asked me to get the vehicle inspected by one of their dealers. I did and said to the service manager I expected an unbiased report and that I expected a copy of the report. He said it wouldn't be unbiased and that I would receive a summary - should have walked away at that point, but stupidly didn't. Anyway the summary mentioned salt and sand being found, which was untrue, and the dealer wiped away the oily stuff that had leaked from the steering box - but I do have a photo of that. Considering taking both dealer and Suzuki to our Disputes Tribunal, like a Small Claims Court, but I need more evidence. Also to report the dealer to the vehicle industry professional association.

Warranty is 3 years, extended warranty is drive train only for five years. What we do have is the Consumer Goods Act, similar to the Sale of Goods Act which basically says things must be fit for purpose. What AI cam looking for is that the two failures are a known issue - but maybe it's just a Friday car. I've had a couple of off road vehicles prior this - a Isuzu Trooper and a Jeep Cherokee, both fir over 10 years, and never had problems like this