If the wires exit the motor's axle on the side that it fell on then the problem could be caused by broken or short-circuiting wires which would be in the area where the wires exit the axle.
If the wires are not on the side that the scooter fell on or are not damaged then it sounds like there may be an internal problem with the motor.
We would start by checking the motor's wires and wire connectors to see if any problems are visible with them and then take it from there.
Scott Shillington