Jacksonjd01

I ought this car brand new with all the bells and whistles. I bought the car for commuting purposes because Ford told me I could get 47 miles per gal. I took it back after 25,000 miles and again at 45,000 miles only to be told give it time. I also received a letter in the mail saying that they owed Med money because they lied about the mileage per gal. I'm still getting 34miles per gallon. Who should I contact at ford to address this?