Holden Cruze with a few problems

I picked up a new Holden Cruze in early December and to my regret there has been a number of problems with it. To start with the gearbox was noisy and was replaced, but the new one is worse. Then it needed a new computer, new seat belt anchors, and there's an intermittent fault in the rear reversing sensors and a bizarre noise coming through the driver's side air vent after the gearbox was replaced. As you can imagine I am not happy.