As TSteven said. You are a Delta Zeta for Life. It Is Much Bigger than the local Chapter. I am sure it hurts like Hell!
But, isnt there always a but, I would really want to know "Why" the Chapter was DeChartered.
If as you say, everything was going smoothly and growing and looking up, then the Question would be why?
Have You conversed with Your Alums? Grey Area Sucks, it would be better if it was explained to you and Your Sisters in Black and White.
That would be the question, What did We do wrong?
If We had know what the supposed Problem was, Could We have Corrected it?
I hope that you keep us updated and informed on Your Chapter Situation as it could be of Help to all of us.