Please see details in link below on how to join the appropriate chat group for your childs team(s):
https://help.clubzap.com/en/articles/2606363-how-to-join-or-leave-or-rejoin-a-chat-group
Here's useful FAQ as well for users:
https://help.clubzap.com/en/collections/820421-clubzap-app
We look forward to making your experience with our new Club App as seamless as possible!
RRFC