I have contacted former group Admin and he is ok to let me takeover. It would make little sense to create a new group with the same purpose. However, former group Admin does not have access any more to his old profile when he created the group. Hence he cannot add me as co-Admin for the group.
Here's the group in question: http://www.glocals.com/groups/geneva-french-german-language-exchange-group.htm
How can we proceed?
Many thanks in advance for your answer.