Just financed a car from a dealer. An hour after getting it out of the lot, a radiated hose burst (apparently a common problem for Nissan patrol). The mechanic said it was a mess under there. Two weeks later, booked her in for an oil change. My mechanic just let me drive it out as he says it's unroadworthy. The turbo is not connected, several oil leaks. Power steering leak with no clamps, and worn rear d bushes and that's only in the area he was working on. What rights do I have under Australian Consumer Law?