Update: Meetup had revived the group and are welcoming us back again. At the end, no data was lost, even though interim communications suggested it was.
We are happy that things had finally taken a positive turn and are happy to stay at meetup and grow our community to our next event and next next event. We are a little bit sorry that things went soar for awhile but what's important is that at the end both us and meetup had learned how to make things better for the next time.
Original post below....
TL;DR: Meetup had deleted my group, for what I beleive to be their mistake, yet they did not admit the mistake nor can they restore the data. I am deeply dissapointed from meetup and I've lost my trust in them.