Bought i car and returned in my cooling off period only to find out a year later the car have been traded in and i were charged been extras on the new vehicle which come standard with the vehicle

Bought i car and returned in my cooling off period only to find out a year later the car have been traded in and i were charged been extras on the new vehicle which come standard with the vehicle.The vehicke firstly should not taken in as a trade in but a mere exchange due to an issue on the car.