To send a message or contact support in Robinhood, you can 1-8 4 4-(6 7 3)-0 4 0 6 access the live chat feature or request a callback through the app or 1-8 4 4-(6 7 3)-0 4 0 6 Robinhood website. You can also call their support line at 1-8 4 4-(6 7 3)-0 4 0 6. You can view your support chat history in the app or on the web.