Richard's Honda Canceled my license plate Baton Rouge Louisiana

Richard's Honda said I bought a car from them and canceled my license plate and registration. I never bought a car from them. I still own my truck. I found out when I was stopped for having a taillight being out, and the police officer said he had to take my license plate because it shows up being canceled. I went the next day to the Office of Motor Vehicles and they said it was a dealership in Baton Rouge who canceled it. They never sold me a vehicle even though they said they did. I still own my truck. Who else has Richard's Honda done wrong? They need to be punished for their actions.