Why pussyfoot around with these people, demand your money back or go to trading standards and get the dealer some serious grief.
If you paid using a credit card, get onto the card company and say you've paid for goods you have not received and want the money back from the retailer.
Just did a search and "world of camping " web site seems to have blue Sunncamp Awnings in Stock.
Just pop in on a busy weekend and talk loudly about the poor service and shoddy way you've been treated, make some noise and they'll change their tune.
Your paying out your hard earned cash, DEMAND some respect and action or take your cash elsewhere.
Quite simple. Just CANCEL the order, and buy elsewhere.
The only thing these clowns understand is hitting them in the pocket. I don't subscribe to all this 'out of stock' ,'might be a few days', 'can we ring you back' (and never do), etc etc nonsense.
If they can't supply what you want DITCH THEM.
There are plenty of good awning suppliers out there, and most of them will supply you an awning within a few days. They are the ones that appreciate your business, and as a consequence look after you as a CUSTOMER.
Something this outfit seems to have forgotten.
Try NR Awnings. They are excellent.