If you don't want Kik any more, you should delete it permanently. This post will show you how to permanently delete Kik for your private information security.

1. Delete Kik Account
WWW.HOWTODELETE.ORG

2. Delete Kik account permanently
 Go to https://ws.kik.com/delete using any
web browser you prefer. As already stated
you must use a web browser to delete Kik
account. You don’t have account deletion
option in Kik application.
 Enter the username of your Kik account. If
you don’t know your username, you can see
it by going to the settings page of your
mobile application.

3.  Now insert the email id that you
have provided while creating the Kik
account. You must have access to
this email id. If you don’t have
access to the email id, then go to
the setting of Kik mobile application
then tap on Your Account and then
change the email ID. Input the email
Id that you have access to and then
hit Save.

4.  Select the reason for leaving the
Kik account. Click on the
downward-facing arrow and then
select the reason why you are
quitting Kik account. If the
reason for which you are leaving
Kik account doesn’t appear in the
drop-down list, click on other
and type it manually.

5.  Check the box confirming that
you know the consequences of
deleting the Kik account
permanently and then click on
“Go”.

6.  Kik will send you an email with the
link to permanently deactivate your
account. Open the email and click
on the link.
 Your account will be terminated
permanently. You will receive a
message from Kik saying that your
account has been deleted
successfully.

7. If you delete the account permanently your username
will not be searchable anywhere on Kik. Your Kik
contact ID will be deleted from the contact list of your
friends. You won’t be able to log back into your
account and won’t have access to any information like
contact and messages. So, if you ever think of returning
to Kik shortly or if you want to keep the information of
your account accessible in then deactivate the account
temporarily.

8. Deactivate Kik Account Temporarily
 Go to https://ws.kik.com/deactivate in any web browser
you prefer. You won’t even be able to deactivate your Kik
account temporarily using the mobile application.

9.  Enter your email id for Kik account.
You must have access to the email
id that you be able to deactivate
your account temporarily. So, if you
don’t know the password of the
email Id then change the email id
that you have provided to Kik by
using the mobile application. Go to
the settings > Your Account >
change the email id.

10.  You’ll receive an email with the
link to deactivate the account.
Click the link, and your account
will be disabled temporarily.
 Kik will ask you the reason for
stopping to use Kik messenger.
However, it is not a
compulsion to answer them. If
you want to explain, click on
any reason and then click on
Go.

11. Source:
https://howtodelete.org/delete-kik-account/