Just close down your account.
You can stop someone by sending message only by blocking that person from your Facebook. Messages will only be stopped when you block the person who is stalking.
I think if you block a person on facebook, he/she is removed from the friends list.
how to block messages of unknown person on facebook
Change her cell phone Block the person on the phone; change passwords. Do not answer or respond to bothersome messages (including telling your friends)--ignore them.
when they chat to you it will go to messages
If a person is habitually sending you prank or any type of undesirable texts or emails, ALWAYS delete that person's messages without opening or reading (if you don't have the ability to block). Don't discuss this person or their messages with anyone; in other words, totally ignore that person's existence. If others try to discuss this person, their messages or especially what this person "said" about you, very matter of factly say something like, "He/she wouldn't say such a thing", or "I don't believe that he/she is that stupid", then move to another subject. Leave the prankster without the satisfaction of hitting a "target", and the point of sending these messages altogether.
To block someone on TextFree, open the app and go to your conversations. Find the chat with the person you want to block, tap on it, and then look for the options menu, usually represented by three dots or a gear icon. Select "Block" or "Block Contact" from the options. This will prevent the blocked contact from sending you messages or calling you through the app.
To block someone on Kik, open the chat with the person you want to block. Tap on their username at the top of the chat, then select the "Block" option from the menu that appears. Confirm your choice if prompted, and the user will be blocked, preventing them from sending you messages. You can also manage your blocked users in the app's settings under "Privacy."
You can block the person so that it can no longer send you messages.
You can block them from within the conversation info screen by swiping the screen left. Then, select device menu and from there, select "Block". Also, you can enter their number manually through the block list by entering Settings, Privacy, Block List and then Block number.
call the service provider and give them the number
what do you mean by blocking ? Stopping a sender of a text message from sending future text messages. It is a matetr that has become irritating. Mike