When you unsubscribe, do you mean deactivating it temporarily or permanently? Deactivating it can be done through the settings option, but for an account to be deleted permanently, you will need to contact Facebook. Request them to have your account deleted permanently. Take note that once you delete it, it won’t be the same as deactivating it, meaning you would not be able to reactivate it or retrieve any information. If you still want to know how to unsubscribe from Facebook, then continue your reading.
Before you delete, you might want to download your info from Facebook. Then directly contact Facebook through email or a call that you want your account to be deleted with no possibility of it ever being recovered.
Once deleted, it won’t be available for others to see anymore. The process could take up to ninety days deleting anything you’ve posted (status updates, photos, backup data, etc.). Your profile would not the accessible to others as the deleting process is taking place.
If a data is available to the both party, such as a message to a friend, that data would not be deleted for the other party since it’s technically not stored in your account. That information will remain even after a complete deletion.