do_shortcode gallery via ajax

Hi,
I have a simple script that load a gallery via ajax on click.
Here’s a code:
FUNCTIONS.PHP

add_action('wp_ajax_load_gallery_callback', 'load_gallery_callback');
add_action('wp_ajax_nopriv_load_gallery_callback', 'load_gallery_callback');

function load_gallery_callback(){
	//require_once('../../../wp-load.php');
	$args = array('post_type'=>'mapa','');
	$name = $_POST['name'];
	$query = new WP_Query($args);
	$break = false;

	if ($query->have_posts()): while($query->have_posts()): $query->the_post();
	if (get_the_title() == $name){
		$zdjecia = get_field('zdj?cia');
		echo apply_filters( 'post_gallery', $zdjecia );//do_shortcode('[gallery link="file" ids="5,6,7,8,9,10"]');
		$break = true;
		break;
	}
	endwhile;
	endif;

	if (!$break) echo 'Brak zdj??';
	die();
}

MAIN.JS

function get_zdjecia($name){
	$.ajax({
		type: "POST",
		url: ajax_object.ajaxurl,//"<?php //echo bloginfo('wpurl').'/ajax.php?post_id=1'; ?>",
		data: {
			action : "load_gallery_callback",
			name : $name
		},
		success: function(data){
			console.log(data);
		}
	}).done(function(ret){
		$('#zdjecia').html(ret);
	}).fail(function(ret){
		console.log('b??d');
		$('#zdjecia').html('Brak zdj??');
	});
	$('html, body').animate({
        scrollTop: $("#scroll").offset().top
    }, 2000);
};

And button:
<p class="wiecej" onclick="get_zdjecia('<?php echo $nazwa;?>')\" >Zobacz zdj?cia</p>

When I click on button then correct images from right gallery show up. BUT generated gallery has set link to attachment file instead media file. Of course I set in admin panel link to media file before.

What is wrong? How to fix it? I need to have gallery with link to media file.

Regards,