Compare meta key Ref_ID
$meta_query = array( array( 'key' => 'ref_id', 'value' => '$original_id', 'compare' => '=', 'type' => 'CHAR', ), );
$meta_query = array( array( 'key' => 'ref_id', 'value' => '$original_id', 'compare' => '=', 'type' => 'CHAR', ), );