I LOOKED at the Holden Captiva diesel before buying a Ssangyong Kyron 2.7-litre diesel, and I am pleased I chose the Kyron. It consistently does 9.2 litres/100km with a best of 8.7 litres/100km on a trip. I'm not happy with the suspension, but my main beef is a severe shudder from the auto gearbox when under brisk acceleration and towing. My dealer tried to fob me off, but when I persisted, admitted this was what Ssangyong labelled as normal. It was due to the gearbox mountings.
FIRST, the fuel consumption is clearly good, so that's a plus. Your gripes are typical of what you can experience with a smallish outfit that doesn't have the clout, and sometimes the willingness, to press the factory to get things fixed. Adding to your possible woes is the change in local distributors to Sime Darby, the Peugeot distributors for Australia. I'd guess the old distributors have little interest in fixing problems like yours and the incoming distributor may have little more interest in fixing problems left over from the old people.