I wasn't there, but it sounds to me like if you were only 15' off the ground at takeoff & had to lower the nose to gain airspeed, you tried to take off to early. As with any plane, you can force them into the air at lower air speed but usually they are soo touchy to almost any control surface input, the slightest movement of the "sticks" will result in exactly what happened to you. I don't know how long you've been flying, but the "jet"type planes aren't very easy for an experienced pilot, let alone an inexperienced pilot. If that is what happened to you, how could you blame the retailer? Not trying to start anything, just trying to figure it out. Good Luck