To delete messages on both sides, you must "unsend" them one by one. With the UnSendAll App you can unsend all of your messages with just a few clicks.
Written by Joe from UnSendAll
If you want to delete Instagram chats from both sides, you have traditionally needed to unsend messages one-by-one. This is very tedious and can take hours or days to fully unsend all of the messages in a chat.
Instagram does not provide an automatic way to unsend all of your Instagram messages, so we created our app UnSendAll which lets you unsend all your messages across your entire Instagram account automatically.
UnSendAll automatically unsends messages for you, and the people you sent them to, with a few clicks. It:
-is designed to stay within Instagram's limits, so you're account doesn't get banned
-runs locally on your computer, so your data is kept safe on your own computer
-has a synced Chat View, so you can track individual chats unsending one by one
-allows you to precisely target individual chats, all your chats, or a selection of chats, so you can unsend only what you need
-has a media only mode, so you can unsend only images or videos
Unsending messages on Instagram has never been easier, click here to learn more.