If you want to leave a Spond group, you can go to the group, press the 3 dots in the menu and select "leave group". The group leader will receive a notification if you leave the group.
If the group is linked to Spond Club, you will be asked to send a message to the group's contact person (often a coach or team leader) who can remove you from the group and inform the club if you also want to terminate your club membership. In some clubs it is still possible to be a member without belonging to any particular group.
If you also want to end your club membership, it is important that you also contact the club directly and opt out in a way that is in accordance with the club's guidelines. Some clubs accept termination by email, while others require you to complete a termination form. Contact your club for more information.