I did want to change my email in Trello as recommended during login. Success.
Automatically linked to a NEW Atlasian account and afterwards no option to re-link my "old" Atlasian with the old Trello ressources as the two Atlasians blocked each other from equalising either of the email addresses.
I did delete the NEW Atlasian but did not get back access to Trello.
What should I do now:
1. to regain my Trello ressources (I could stop deletion of the NEW Atlasian)
2. to login all ressources again under one (ideally changed) email.
Thanks