You need to consider when choosing unsubscribe, the only choice available in your Facebook profile is the disable account, something that makes sure that everything is completely eliminated, so it might be that the photos, remarks and personal conversations are saved, although already not be available to them.
Steps How To Delete Facebook Account
If you want to erase your single account you need to visit the following link and validate:
http://www.facebook.com/help/contact.php?show_form=delete_account
Note: When validate not be able to recover your data and whatever to do with the Costs, already not you can use features it email, which offered low, you would have utilized a new account hotmail, gmail, and so on.
Delete request from sent out by mistake
To erase a demand erroneously sent out to an individual (e.g. ask for friendship) in the leading menu go to "Configuration", then "Personal privacy settings".
Then compose the complete name of the individual in the field "Block individual".
Then look it up and lock it. So not your friendship request, will be given that obstructing someone removes any link with it. If you desire this person to find you or have contact with her, you go back to the 'blocked list' and eliminate it by pressing Delete (but currently not your application will appear to him because it was previously obstructed).
This does not work for sent messages, considering that they are all saved in the Inbox of the individual.
Thus the article Steps How To Delete Facebook Account from us, hopefully useful thank you.