If you happen to have ordered the wrong spring wind in the correct length, diameter and wire size you may still be able to use it. This will only work if you have one torsion spring on a door.  Rather than reordering a new spring with the correct wind, you can remove the spring and install it on the other side of the center support bracket. You may need to relocate the spring anchor bracket to make room for the spring to fit depending on where it is located.