Before I bought the truck salesman name alex start...

Before I bought the truck salesman name alex started it and I noticed a grinding noise told him about it. Took it for a test drive I noticed a uncomfortable vibration. He said if it happens again it'll be fixed free of charge. All this happened 2 weeks ago. Brought it to them yesterday told them about the problem..... nothing was fixed... all the had to say it was normal.... I'm feeling like I got ripped off smh.i recommended anyone wants a used vehicle do not go them you'll have better chances elsewhere