Terrible experience! I Purchased a car from Shanno...

Terrible experience! I Purchased a car from Shannon Motors about 6 months ago and did everything through them, including the registration, I paid the full tax for my car to be registered for 2 years but just found out the hard way that my car was only covered for 1 month even though i registered it for 2 years. I was pulled over 2 days ago and was told my registration needed to be renewed, the Officer looked at my registration and laughed and said, that i have been screwed over because my registration only covered a month even though i paid and registered it for 2 years. I'm just glad the officer let me off with a warning instead of impounding my car.AND on top of it all about a month with the car, my engine light came on, and I took it to the mechanic at Shannon Motors and they kept my car for 3 days then I got my car back with the engine light still on and the car running worse then before, even though they said they had, "fixed it."