To permanently delete your Facebook account, you can do the following:
Log in to Facebook from a computer
Click your profile picture in the top right corner
Select Settings & privacy, then click Settings
Click Your Facebook Information
Click Deactivation and Deletion
Choose Delete Account, then click Continue to account deletion
Click Delete Account, enter your password, and then click Continue
@Horrrflmlvr it's not working
@Horrrflmlvr @dauphin87 I cancelled mine in the app, it works in the app too .