Thanks for your advice.
The car is from a dealer and I've had it less than 30 days, the car is booked in to be looked at next week, but I may just tell them I want to exchange it under their 30day exchange policy. Do you think my reasons for not being happy with the build quality are acceptable for wanting to exchange the car? It's already been back once. The only thing is, is that if you drove it, you'd probably think, yeah, great car, but to me I'm not happy with all the squeaks, and the seats don't seem to be fixed probably, they make a knocking noise when starting and stopping.
Also, I know I'm going on a bit, but I appreciate peoples knowledge on here- Going back to my swerving when accelerating problem - The steering wheel lock on my car never ever locks in a straight/central position if you know what I mean - could this be an indication of steering rod problems?