Gasoline Fuel System Related Problems of the 2013 Ford Fiesta

Gasoline Fuel System problem

I bought the 2013 Fiesta in August of 2013. With 500 miles on it the transmission was lurching, clanking, and grinding. I took it to the dealer and they told me it was normal and they wouldn't even look at it. I also complained that the car was only getting 25mpg highway when it claimed 40. They said it was in the window for epa, and it would get better after 1500 miles. I complained to the main Ford customer service and they told me there was nothing they could do. I now have $14k miles on it and it still averages 20-25mpg highway. I had to take the car to them at $12k miles to fix the engine malfunction. When I called the mechanic he already knew what it was, which means it happens a lot. The engine still lurches, clanks, grinds, etc. I'm $8k upside down on trade in already because the value of this car has dropped so much in the last year due to all these issues.