Solution:
This is an HTML context where the form action is literally the URL you are trying to submit the form to. You aren’t using the blade template syntax or calling any Laravel function in the form action assignment. You also aren’t defining the route action correctly.
You would either use the route name:
route('new_calls.store');
Or you would use the action:
action('CallsController@store');
You are using a combination of the two.
Replace your form action correctly:
<form action="{{ route('new_calls.store') }}" method="post">