I have read your post and I agree they screwed you around. I know of several Canadian legal precedents that have nearly identical circumstances: a dealer promised something before the sale and it was not completed. I am amazed they are not willing to work with you on this, it will cost them considerably more to pay the court and other costs than it would have to work with you, which tells us a lot about the integrity of the dealer. It does not have to be itimised in the sales contract given your oral discussions and letter of offer. The precedents I am aware of reach the Superior Court of Ontario, but there are multiple in small claims and the General Division Courts. If you do your research, you should win.