New here.
Anyways, a good way to get through to your mom could be a written letter.
It's personal, you have time to get all your feelings down, and she can't interrupt. You can take time to sort it all out and say things exactly how you want without rash behavior.
Be sure as well to tell her how much you love her, lots of parents feel a disrespect for authority is from a lack of their nurturing so they overcompensate in situations like this. Assure that it isn't so, and that you appreciate all she has done for you, while stating your feeling of injustice at the situation.
Be respectful and mature in handling it, but be firm in what you believe.