If you’re like most people, you probably use Facebook Messenger to communicate with friends and family. But there are a few things you can do to make sure your calls and messages are never sent through the app - even if someone is blocking your account. To delete calls on Facebook Messenger, open the app and sign in. Then, under " Calls," select " Delete." Type in the phone number of the person you want to stop calling, and hit " Delete." You’ll need to confirm this before it deletes the call.