Hi,
ALL of the states in America have a Consumer Protection Agency, run by the state. As such you can file a complaint against the dealer and their delaying tactics, which are "normal" procedure, and mainly laziness and intentional, for many a car ownership.
I would file a complaint IMMEDIATELY (for example, in the state of WA you can do it online -- nice and fast!) and it goes straight to the office of the Attorney General of that state. If you have to mail it, registered mail and get a receipt that it got there. And you can (usually) get the rest of the information with email.
And these folks NOT responding, and ignoring the whole thing (which they will to annoy you!), will get them fined big time by the state, and in some cases, have their license to do business suspended until resolved, which on occasion happens, although rarely. No business, in their right mind, would want to have any kind of a record with the State Attorney General, for something that is wrong, specially if it gets resolved in your favor.
On one complaint, I made in California, the judge even asked ... any more terms that you want to file against the insurance company? I asked him later, why he asked that. Because if you had told me that you wanted compensation for time lost and this and that, you would have gotten it times three! Needless to say, I fell out of my chair and tree! But I was OK, and did not pursue the punishment thing.
You have to take a stand. And let them know that you are not a nobody that doesn't know diddly squat about the law. If they want to play games, you can too. But they will pay for them!