Each Sorry™ account has an 'owner', who is used as the primary billing contact, and also holds the privileges to invite new team members, change plans or cancel your subscription.
Switching Account Ownership
When logged in as the current owner, navigate to the Team Members screen, where you'll see yourself, and your team members listed.
Next to your name in the list find the "Change Owner" dropdown, click it, and select another member of your team to become the owner.
Warning: Once you've moved ownership to another person, only they will be able to relinquish it to someone else, you will be demoted to a standard account member.