Update:
Nothing - Yes, nothing further.
No calls, no emails despite being promised one.
I think they've realised they've fudged it by not getting their story straight.
We're not concerned anymore - were a little at first.
Our mechanic is happy to state that he couldn't see any signs of damage, and as they are saying that this 'damaged' part is what is causing the wheel to rub.... well... it wasn't rubbing for the first 6 weeks of ownership so whatever is bent has been bent whilst they've owned it.
Thank you all for your comments, it has helped to put our minds at rest.... Like all, we don't like having unhappy customers.
We put so much pride in our work, choosing and prepping our cars to a high standard so having a moaner does knock us a bit ( I think we assume the customer is right ). It's great to have other dealers comment to our posts with their own insights and experiences.