How to open my door completely?

I assume that your door is an insulated version by the 'wind up 'clue. The motor limit settings decide how high the door curtain opens to. If you can't reset them you need to push the curtain up until it is free of the guide tops and then tuck it back over the roll and into the guides again. This is a two man operation. If your roll has a cover fitted inside, this needs to be removed. This procedure will reset the motor/curtain relationship. You should get a professional installer to set the limits properly and avoid any further damage.

Brian Winslet. Chameleon Garage Doors, Lincoln.
March 2009