I'm unsure. If you did actually get your activity - which I'l check later - then I agree with you. However, you haven't attended more meetings than just the last two, so that's just a blatant lie. But you did do your SA duties this week except for not attending the meeting, which is actually part of being Lead Team.

If you did indeed get your activity then I agree with you that you should be un-demoted, but if not then I'm afraid I'll have to agree with Max and Xnator.