My sister is 24 she wanted to trade in her car, th...

My sister is 24 she wanted to trade in her car, they told her she cannot trade in her car because it was not worth it. So she bought a car and now she has 2 cars she took the car back she wanted to take it back they told her she cannot return the car she put down 1600 and didn't ask for any money she wanted a different car so she wanted to return them today they said now you can trade in your old car for what you want but you have to keep the other car to what kind of car place is this taking advantage of young people just to make some money