Taigun low mileage inefficient AC

In traffic or even in highways it gives a mileage of 6 to 11 Kms per liter. Driving comfort is nothing great, Just average as the suspension is hard and you can feel every bump and pot hole. The ac at 21 degrees does not have the feel. I have approached the Volkswagen service center but they seems to have no answer. Please do not buy this car for comfort as the air conditioning quality and mileage is poor.