Sad bussines

Me and my son went to Hyundai Centurion yesterday. My son had this salesperson that wanted to show him another car, but we only went for i20s, we let him have his say, said later, we just came for the i20s, at the end, by my son wanted to trade in his car and we, me actually, getting a car for a certain prise range that we asked for, the salesperson with his boss, loaded the price to what we couldn't agree to, explained again that my son's car is a limited addition, that is what the car went on on the adds, they really thought we didn't know what they were doing, because we know it is sales, my son looks younger as he is, and it seems that they thought he doesn't know what he was talking about. Very sad, I wanted the car.