Where cars are kept in a central stock the same car can conceivably be sold many times over by different dealers at the same time. But this should have been apparent sooner, and because it wasn't you have a reasonable case to lean on the dealer to get you an equivalent car to the one you ordered and part-paid for. Make sure you use the term "part-paid for", because that makes it a contract and the Ford dealer is in breach of that contract. State that over the past 14 days you have "lost the opportunity through the dealer's negligence" to buy a similar car elsewhere for that price. (A.R. did exactly this and was rewarded with another Fiesta Zetec, same colour, with a few extras thrown in, for the same price.)