Sold me a vehicle with a bad transmission. the sec...

Sold me a vehicle with a bad transmission. the second I pulled it onto the highway after buying it I noticed something wrong. They refused to help me, at all. I payed 13,000 for used vehicle, and around 6,000 for a transmission, radiator and coolant lines(Xterra) within 3 months. Every time I see, buy happy, I cringe.