andrew, sorry to read about your problem 'van.
we had a brand-new elddis in 02 and had noting but trouble with it; doors coming off/not shutting, roof trims missing/falling off, leaking toilet, cracked washroom sink, lights not working, missing upholstery; our list was endless.
on reflection, i know, we should have refused the van on handover as many faults were apparent then, but you know, 'shiny new van appeal' takes over, and the dealer in question assured us all would be sorted out in 'a couple of weeks' (yeah right)!!!
after much complaint to dealer and elddis, and many months of disappointment with our van, the dealer agreed to take it back. we turned up with van in tow and when the paperwork was being completed we noticed a large sum of money had been removed from the final balance. 'thats the price of the van less vat' we were told...
took van home again!!!
in 04 we bought another new van from a different dealer and after a few teething troubles have been 'well chuffed' with it.
hope something gets sorted in your favour andrew, but don't bet on it!