To deactivate your account:
Select Your Account
Tap Reset Kik Messenger
Enter the email address that's registered to your Kik account on the Deactivation website. You'll receive an email with a link to deactivate your account.
If you signed up for Kik using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Kik. Click the icon below to find out how.