php - Remove duplicates in foreach loop from custom taxonomy

It shows this result in the foreach loop and it should remove any duplicates

spain
philippines
spain
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I tried using array_unique() but its not working for me

This is the code I'm using and working fine, its just that it has duplicates

<?php 
if (is_tax() || is_category() || is_tag() ){
    $qobj = get_queried_object();

    $args = array(
      'posts_per_page' => -1,
      'tax_query' => array(
        array(
          'taxonomy' => $qobj->taxonomy,
          'field' => 'slug', 
          'terms' => $qobj->slug
        )
      )
    );

    $random_query = new WP_Query( $args );

    if ($random_query->have_posts()) {
        while ($random_query->have_posts()) {
          $random_query->the_post();
            $term_list = wp_get_post_terms($post->ID, 'country', array("all"));
            foreach($term_list as $term_single) {
                echo '<a href="'.dirname(get_the_permalink()).'">';
                echo $term_single->slug;
                echo '</a><br>';
            }
        }
    }
    wp_reset_query();
} 
?>
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added this for debugging - var_dump($term_list); and this is the result

array (size=1)
  0 => 
    object(WP_Term)[1464]
      public 'term_id' => int 2
      public 'name' => string 'Spain' (length=5)
      public 'slug' => string 'spain' (length=5)
      public 'term_group' => int 0
      public 'term_taxonomy_id' => int 2
      public 'taxonomy' => string 'country' (length=7)
      public 'description' => string '' (length=0)
      public 'parent' => int 0
      public 'count' => int 2
      public 'filter' => string 'raw' (length=3)

array (size=1)
  0 => 
    object(WP_Term)[1473]
      public 'term_id' => int 5
      public 'name' => string 'Philippines' (length=11)
      public 'slug' => string 'philippines' (length=11)
      public 'term_group' => int 0
      public 'term_taxonomy_id' => int 5
      public 'taxonomy' => string 'country' (length=7)
      public 'description' => string '' (length=0)
      public 'parent' => int 0
      public 'count' => int 2
      public 'filter' => string 'raw' (length=3)

array (size=1)
  0 => 
    object(WP_Term)[1475]
      public 'term_id' => int 2
      public 'name' => string 'Spain' (length=5)
      public 'slug' => string 'spain' (length=5)
      public 'term_group' => int 0
      public 'term_taxonomy_id' => int 2
      public 'taxonomy' => string 'country' (length=7)
      public 'description' => string '' (length=0)
      public 'parent' => int 0
      public 'count' => int 2
      public 'filter' => string 'raw' (length=3)    
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All I need is to remove the duplicates and I am set, I not not very familiar with this and its very complicated, I'm trying to figure this out since yesterday, anybody please help me get it working or just in the right track, thanks