Wp query pagination and categories

<?php
/**
 * The template for displaying the archive page (categories)
 *
 * @link https://developer.wordpress.org/themes/basics/template-hierarchy/
 *
 * @package hicetnunc
 */
    get_header(); ?>

    <?php
    if ( have_posts() ) : ?>

        <header class="page-header no-image">
            <?php
                the_archive_title( '<h1 class="page-title u-text-center">', '</h1>' );
            ?>
        </header><!-- .page-header -->

        <?php get_template_part( 'template-parts/filter-category' ); ?>

        <?php get_template_part( 'template-parts/blogpost-list' ); ?>

        <!-- TODO pagination -->

        <?php
        else :
            get_template_part( 'template-parts/content', 'none' );
        endif; ?>

<?php
get_footer();

<nav id="cat-filter" class="bg-dark nav justify-content-center">
  <ul class="nav">
    <?php //Filter
      $categories = get_categories(array(
        'orderby' => 'name',
        'parent'  => 0,
        'order'   => 'ASC'
      ));

      foreach($categories as $category):
        // Check the current category
        $cats = get_categories($categories);
        if($cat != $category->term_id) {
          $activeClass = '';
        }
        else{
          $activeClass = 'active';
        }
    ?>
      <li class="nav-item">
        <a href="<?php echo get_category_link($category->term_id); ?>" class="nav-link u-white <?php echo $activeClass; ?>"><?php echo $category->name; ?></a>
      </li>
    <?php endforeach; ?>
  </ul>
</nav>

*This is the problem if I move the query from there the category works but If I leave the query the pagination doesn't have the post_per_page argument to take and doesn't work...*

blogpost-list.php

<?php
 /*QUERY*/

  $paged = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;
  $args = array(
    'post_type'=>'post',
    'post_status'=>'publish',
    'posts_per_page' => 6,
    'paged' => $paged
  );
  $wp_query = new WP_Query( $args );

 /*END QUERY*/
?>

<div id="blogpost-list" class="container">
  <div class="row blogpost-wrapper">
    <?php
    /* Start the Loop */
    $i = 1;
    while ( have_posts() ) : the_post();?>
      <?php if ($i % 3 == 0): ?>
        <div class="blogpost-item-grid">
            <!-- some stuff to display the post.. doesn't really matter-->
          <?php get_template_part( 'template-parts/content-post-preview-large' ); ?>
        </div>
      <?php else: ?>
        <div class="blogpost-item-grid">
            <!-- some stuff to display the post doesn't really matter -->
          <?php get_template_part( 'template-parts/content-post-preview' ); ?>
        </div>
      <?php endif; ?>
      <?php $i++; ?>
    <?php endwhile;?>
  </div>
</div>