Category A
   Category A1
   Category A2
   Category A3

if ( have_posts() ) {
        do_action( 'woocommerce_before_shop_loop' );
        woocommerce_product_loop_start();

        if ( wc_get_loop_prop( 'total' ) ) {

            while ( have_posts() ) {
                the_post();

                // here I filter the products from specific category
                global $post;
                $skip = false;
                $terms = wp_get_post_terms( $post->ID, 'product_cat' );
                foreach ( $terms as $term ) {
                    if(substr( $term->slug, 0, 7 ) === "zubehor") {
                        $skip = true;
                        break;
                    }
                }

                if($skip)
                    continue;

                do_action( 'woocommerce_shop_loop' );
                wc_get_template_part( 'content', 'product' );
            }
        }

        woocommerce_product_loop_end();
        do_action( 'woocommerce_after_shop_loop' );
    }