Slides is a place for creating, presenting and sharing slide decks.
How to Cancel Slides Manually
Unsubscribe by following these steps:
1.) Log in to your account: https://slides.com/users/sign_in
2.) If you would like to permanently delete your account you can do so in the bottom of the Account Settings page. All of your decks will be deleted together with the account and any ongoing subscription will be canceled. Note that this can not be undone.
Or, open a support ticket by clicking Contact Support on the menu to the right: http://help.slides.com/