Ajax Refetch events with wpfc_fullcalendar_args

Hi,
Please help with my ajax issue.
Based on this post :
https://wordpress.org/support/topic/fullcalendar-and-owner

i’m able to filter my calendar view to display only events from a group, here is my snippet:

function wpfc_filter_events( $args ) {
    /* Now pass the args to override default current values. */
    $group_id = '94'; // for test
    if (isset($group_id)) :
    $args['group'] = $group_id;
    endif;
    return $args;
}
add_filter( 'wpfc_fullcalendar_args', 'wpfc_filter_events', 10, 1);

but what i (want) can’t manage to do is to call this filter in ajax!
i want to switch between different calendar views when i click on different links in tabs, example: calendar 1, calendar 2, etc…

here is what i have tried out in wp ajax without success:

function wpfc_update_events_ajax( $args ) {
    /* Now pass the args to override default current values. */
    $group_id = $_POST['groupid'];
    if (isset($group_id)) :
    $args['group'] = $group_id; //ex: '94'
    endif;

    return $args;
}
//add_filter( 'wpfc_fullcalendar_args', 'wpfc_update_events_ajax', 10, 1);

function my_planning_update_ajax() {
    add_filter( 'wpfc_fullcalendar_args', 'wpfc_update_events_ajax', 10, 1);
}
add_action( 'wp_ajax_my_planning_update_ajax', 'my_planning_update_ajax' );
add_action( 'wp_ajax_nopriv_my_planning_update_ajax', 'my_planning_update_ajax' );

this ajax function are call with the query ajax method when i clic on a link :

$("div.menu>div.list-group>a").click(function(e) {

e.preventDefault();
          $(this).siblings('a.active').removeClass("active");
          $(this).addClass("active");
          var index = $(this).index();

          var calendar = $('.wpfc-calendar');
          var group = $(this).attr('id');

               var data = {
                  action: 'my_planning_update_ajax',
                  groupid: group
              };

$.post(ajaxurl, data, function(response) {

                alert('Update Planning : ' + response);

               // WPFC.data[group] = group;
                //calendar.fullCalendar('removeEventSource', WPFC.ajaxurl);
                //calendar.fullCalendar('addEventSource', {url : WPFC.ajaxurl, allDayDefault:false, ignoreTimezone: true, data : WPFC.data});
                //calendar.fullCalendar( 'refetchEvents' );    // refresh calendar events
            });

calendar.fullCalendar( 'refetchEvents' );    // refresh calendar events

});

is there a way to apply the filter ‘wpfc_fullcalendar_args’ in ajax?

Please, please help!!

https://wordpress.org/plugins/wp-fullcalendar/