Can you share your expertise on this plz?

Hi Sajhaities! I bought a car from a dealer 28 days back. They had given a temporary tag. They were saying that they will provide me a original tag from the dmv in a week. But each time I call them they ask me to wait and not to worry. The dealer is 40 miles far from me and I haven't been there. I asked DMV and they said they can't do anything unless 31 days or when it's expired. After 31 days DMV said I can file a complaint. I can't figure out what to do for now? Have anyone been through this?