Import taxanomy terms - wordpress

Question

Hi I am importing a csv file, where one of the columns is representing the taxonomy term names separated with ; delimiter.
The code I have is the following:
public function save_post($post,$meta,$terms,$thumbnail,$is_update) {
// Separate the post tags from $post array
if (isset($post['post_tags']) && !empty($post['post_tags'])) {
$post_tags = $post['post_tags'];
unset($post['post_tags']);
}
// Special handling of attachments
if (!empty($thumbnail) && $post['post_type'] == 'attachment') {
$post['media_file'] = $thumbnail;
$thumbnail = null;
}
// Add or update the post
if ($is_update) {
$h = RSCSV_Import_Post_Helper::getByID($post['ID']);
$h->update($post);
} else {
$h = RSCSV_Import_Post_Helper::add($post);
}
// Set post tags
if (isset($post_tags)) {
$h->setPostTags($post_tags);
}
// Set meta data
$h->setMeta($meta);
// Set terms
foreach ($terms as $key => $value) {
$h->setObjectTerms($key, $value);
}
// Add thumbnail
if ($thumbnail) {
$h->addThumbnail($thumbnail);
}
return $h;
}
public function setObjectTerms($taxonomy, $terms)
{
$post = $this->getPost();
if ($post instanceof WP_Post) {
wp_set_object_terms($post->ID, $terms, $taxonomy);
} else {
$this->addError('post_is_not_set', __('WP_Post object is not set.', 'really-simple-csv-importer'));
}
}
The $key is the taxanomy ex: Col and the value is the actual name ex: Fiction Books
Any idea why the taxanomy terms are not ticked when the importation is complete?