seat stuck in down position problem

[EDDIE]

Had passenger seat out to get some cavity wax into inner sill area via bungs , when I put it back in tested before bolting in and both of the seat cushion motors went down and stuck in the down position and won't raise up.Seat is out and is getting power to the motors and the switches are working ok - both up and down positions.So the lifters must have got jammed ,any ideas how to release without stripping everything out of the mechanism ?
Probably first time the seat has been right down in its adjustment.

Nick