scammed

I was charged $299 for something I didn't want and the salesman, Nate Niswander, didn't mention it. $299 more than what he said. I purchase the car March 27, 2018 and still have the email from Nate in which he states the total price of the car plus tax, and government fees. I trusted him so when the papers were presented to me to sign, I did without reading them.