Short of a screw slipping and causing damage, I can't see how they could tell if I had attempted to tweak the setup - especially if it was borked to start with.
I was in the middle of editing, but I was going to say that I would expect a £1000+ instrument to arrive in at least a sensible basic setup. It may well need some tweaks to suit personal preferences, but I'd be pretty annoyed if it was as far out of whack as the OP is describing.