First open your browser and go to the facebook.com in your devices
Then enter your credentials
Then facebook will show that your password is not correct.
Then click on forgot password option
Then select option which you can easily such as code via email, then click continue
Then you will get a six digit code on you email, enter the code in the required field
After clicking the continue button type your new password
And click on continue button
Then, if you don't stop the deletion, a notification will appear letting you know when your account will be erased. Understand that there will be no chance of healing after that time.