Custom Page Template Pagination not working

Hello all, I made a custom page template that queries the category with the slug = aktualne. I use this custom page template in my Events page to display posts with the category = aktualne:

<?php
/*
Template Name: Aktualne
*/
?>

<?php get_header(); ?>

<section class="content">

	<?php get_template_part('parts/page-title'); ?>

	<div class="pad group">

		<?php get_template_part('parts/featured'); ?>

		<?php query_posts('category_name=aktualne') ?>
		<?php if (have_posts() ) : ?>

			<div class="post-list group">
				<?php $i = 1; echo '<div class="post-row">'; while (have_posts() ) : the_post(); ?>
				<?php get_template_part('content'); ?>
				<?php if($i % 2 == 0) { echo '</div><div class="post-row">'; } $i++; endwhile; echo '</div>'; ?>
			</div><!--/.post-list-->

			<?php get_template_part('parts/pagination'); ?>	

		<?php endif; ?>
		<?php wp_reset_query() ?>

	</div><!--/.pad-->

</section><!--/.content-->

<?php get_sidebar(); ?>

<?php get_footer(); ?>

But there seems to be a problem in my pagination. It displays the pagination but when I click on a page number eg. page 2. it directs to this link /aktualne/page/2/. BUT what displays in that link are the same posts displayed on the first page. And when I click on other pages like page 3. or 4., it also displays the posts of the first page.

This is the codes on parts/pagination:

<nav class="pagination group">
	<?php if ( function_exists('wp_pagenavi') ): ?>
		<?php wp_pagenavi(); ?>
	<?php else: ?>
		<ul class="group">
			<li class="prev left"><?php previous_posts_link(); ?></li>
			<li class="next right"><?php next_posts_link(); ?></li>
		</ul>
	<?php endif; ?>
</nav><!--/.pagination-->

May I ask you for your help please?

Thank you!