You must take into account when choosing unsubscribe, the only choice available in your Facebook profile is the disable account, something that ensures that whatever is entirely eliminated, so it might be that the images, comments and personal conversations are stored, although already not be accessible to them.
How Delete Facebook Account
If you wish to delete your single account you have to check out the following link and validate:
http://www.facebook.com/help/contact.php?show_form=delete_account
Note: When confirm not be able to recover your data and everything to do with the Bill, already not you can utilize functions it email, which offered low, you would have used a new account hotmail, gmail, etc.
Delete demand from sent out by mistake
To delete a request mistakenly sent to an individual (e.g. ask for friendship) in the top menu go to "Configuration", then "Personal privacy settings".
Then compose the full name of the person in the field "Block person".
Then look it up and lock it. So not your friendship demand, will be since blocking somebody eliminates any link with it. If you want this person to find you or have contact with her, you go back to the 'obstructed list' and eliminate it by pressing Erase (but currently not your application will appear to him because it was previously obstructed).
This does not work for sent out messages, given that they are all saved in the Inbox of the person.
Thus the article How Delete Facebook Account from us, hopefully useful thank you.