runaway copter

After a hard landing, I am having issues with out of control flight. Bird goes up and down with no movement of sticks. Would crash if I didn't over ride what it is trying to do. I didn't think I was going to get it down. I was calling it down and it would descend a bit, go back up, start coming...

New user phantom dj1. Upon landing bounces several times. Left lever joystick pushed back to throttle cut off but kept on going. Tried to shut off transmitter unsuccessful then was able to grab hold of copter and copter turned off after 6 min. Any idea? Given as a present. Second hand purchase