Welcome to the Candy Crush Saga Community
Do you have a question or need help with your game? Ask the Community.
@j_liah maybe things have changed in the meantime. But a while back I got the impression from players with the same situation that, once you got invited by someone who has custom teams and you don't, you don't have much control over it after, because custom teams don't get "canceled" after a week with no rewards, like old teams.
The best thing ever would be to get the update for custom teams but that too is out of your control (except making sure that the app gets updated always) because custom teams F5 is a test feature still in the process to be distributed to all players.
Hope this helps :)