Volkswagen Clarksburg

I bought a car from them. They told me it was turned in as a lemon but they fixed everything so It was as good as new and that it had a good title. Come to find out when I trading it that it had a branded title and is only worth 60% of the regular value even though they charged me full price. After confronting them about it. They offering me half of what I paid and said that that's all they'd do for me