Wells Fargo Auto Finance They accepted a fraud contract with excess value of vehicle increase interest Phoenix, Arizona

On July 2007, I purchase a vehicle for 24,000 wich I was told. Then I found out by Wells Fargo that the 2003 GMC Yukon was 28,000 Plus interest of 14,000 wich the total is 42,000Plus. Is been four years trying to fix this problem is still nothing has been resolve. Right now I am going to a difficult time and the economy is not helping. The dealership has been closed since last year I believe, and Wells Fargo Representive hasn't help much. I also purchase 2007 chryler 300c and it was the same amount wells fargo manage to fix it and from 42,000 went down to 26,000 vehicle was sold to me 24,000. So why haven't they change the GMC Yukon.....????