Every organization should have an appeal process in place.
If you get a copy of the curriculem on firearms safety, most of the answers should be explained in there. If the instructor is not following the lesson plan, bring it to the superior's attention and appeal the punishment.
Stress that safety is everybody's objective in the field, in the home, at the workplace. You were only trying to do your part ensuring that there was a safe environment.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)