Does this make sense?

Does this sound right to you?
A relative gifted me a vehicle, BUT I had to give them my old vehicle. They sold it and made their money back for the vehicle they gifted me. Now, a year later, they are saying that since they gifted me this vehicle, I am never allowed to sell it or trade it! Does this sound right or wrong to you? If I traded my old vehicle and they even got their money back by selling my old vehicle? They should not have a say in what I do with it now or in the future… right?