As a last resort to moving your dish, you might want to try this, if nothing else is available.
There is usually only one bolt holding the motor to the end of the actuator. Back that bolt off till you can move the motor (JUST the motor, it'll spin or turn without moving the actuator arm).
Remove the motor.
There will be a flat piece of metal sticking out.
I don't have anything to move either of my ten footers, but when I clamp a vice grip on that flat piece of metal, I can spin the vice grip and turn the inner tube to move the dish.
I would add pictures if it wasn't so cold outside right now, but if pictures are needed, I'll add some later in the day.
Spin the vice grip till you can reach the lnb or at least till you can reach it standing on a ladder as stated above
Photto