If you think you've been scammed or taken advantage of by a car dealership, there are a few things you can do. First, try to negotiate with the dealership. It's possible they'll be willing to work with you to make things right. If that doesn't work, your next step is to file a complaint with the Office of Fair Trading. Finally, you can always take legal action against the dealership. This is usually a last resort, but it might be necessary if you've suffered financial damages as a result of their fraud or misrepresentation.