There was a message request on my DM in Instagram for a month, but than it disaperred. I assumed that the person unsend the request because I no longer see request or message. But when I press to send message to this person, I see the message which was in request before. Does it mean that person unsend it but I still able to see message if I start texting him? I thought if you unsend message the other person is not able to see it anymore in any way