In order to leave a team, you must transfer ownership of the team first. To transfer ownership of a team:
From a computer, log in to your TeamLinkt account (app.teamlinkt.com)
Open the dropdown in the upper right where your teams are listed, click the 'Manage Teams' button at the bottom of the list.
If you are the team owner, in the Actions column you will see a 'Transfer Ownership' button - click this
Select the Member you would like to transfer ownership to and enter the confirmation code.