Can't reply to messages on instagram? Don't worry, here in this forum I'll tell you the best way to reply to messages on your Instagram on your mobile.
1. Open the Instagram app on your phone.
2. Tap on the "Instagram Direct icon" in the upper right corner.
3. Then, Open any chat by tapping the person who sent you a message.
4. Tap and hold the message you want to reply and click on the "Reply" key on the bottom left.
5. Enter your message and click on the "Send" option.
Now you'll see a message that says, "You replied" above the Chatbox.