In reply to Rob333:
Rubbish, unless its clearly been abused, if the tent is faulty they are obliged to act. Yes, its probably ultimately Terra Nova's/WC's fault, but that's the retailers problem not yours. Explain clearly but politely to the retailer that you are rejecting the tent as faulty and not fit for purpose, and you expect them to sort it out immediately. If you get no joy, go up a management level. If you still get no joy, go talk about it on their social media pages. I believe in giving a retailer a fair opportunity to sort things out, but if they won't play ball, on their head be it.