You can always sue. What you can win will turn on the provisions of your contractual agreement with the sellor. An attorney would need to reveiew your documents before knowing what you can and can't be successful with.
NOT LEGAL ADVICE. FOR EDUCATION AND INFORMATION ONLY. Mr. Rafter is licensed to practice in the Commonwealth of Virginia and the US Federal Courts in Virginia. There is no implied or actual attorney-client relationship arising from this education exchange. You should speak with an attorney licensed in your state, to whom you have provided all the facts before you take steps that may impact your legal rights. Mr. Rafter is under no obligation to answer subsequent emails or phone calls related to this matter.
You can consider filing a complaint with the Attorney General's Office: http://www.ncdoj.gov/complaint.aspx There is a special section and form devoted to Automobile issues; scroll towards the bottom of the page and you will see the section. In cases where consumers’ complaints show a pattern of illegal business practices, the AG's office may take legal action to enforce the law on behalf of the general public.