<?pp

/*

  !!! Just a quick warning, if WooCommerce updates its plugin these changed will be gone !!!

  1) Find class-wc-eu-vat-number.php, it's located under wp-contents/plugins/woocommerce-eu-vat-number/includes
  2) Skim trough until you find line 160
  3) Do the following
*/

/* On line 160 you'll find this line of code */
  return new WP_Error( 'api', sprintf( __( 'VAT API Error: %s', 'woocommerce-eu-vat-number' ), $response->get_error_message() ) );

/* Replace line 160 with the following */
  if( strstr($response->get_error_message(), 'cURL error 28') !== false ){
    // fail silently and let order go through
		return true;
	} else {
    return new WP_Error( 'api', sprintf( __( 'VAT API Error: %s', 'woocommerce-eu-vat-number' ), $response->get_error_message() ) );
	}