Deactivate Facebook "Permanently"

All you need to do is to search "delete Facebook" in help center of Facebook there you will find a thread with the title "I want to permanently cancel my Facebook account" follow the instructions there and your account will be deleted in 14 days, but remember not to use it anyway for 14 days or it will be reactivated again.

After 14 days try to register a new account on facebook on existing email address which you were using earlier, if it permits you to make a new account on that email address, that means your previous profile has been deleted and you've been removed from facebook along with your personal details.

Yep its a comment I got for my previous post. and it works. Thank you who ever it is commented :)