If you are struggling with Facebook Messenger and don’t know how to turn off call on the Facebook page then this article will give the easiest way to do it:
Move to the Facebook Messenger chat area and search for the person who is trying to call you.
Move to the chat of the person.
Click on the three dots at the top of the interface.
Search for mute notification and tap on it.
Now, search for call notification and turn of the notification settings.