For unsending a message you have to follow the instructions-
- Tap on the chat button at the top right corner of your feed page.
- Choose the chat and visit the message you would like to unsend.
- Now, tap and hold on to the message.
- Next, tap Unsend, then tap Unsend to confirm or Unsend Message, then Unsend to confirm.
After you unsend a message, it will no longer be visible to people incorporated in the chat. Remember, the people you sent it to may have already seen your message.
