Hero Motocorp — mileage issues

Address:	Faridabad, Haryana, 121004
Website:	Hero Moto Corp

I purchased my bike on 2 jan, 2018. Since then 3 services have been made on proper time.
But i had mileage issue right from the date of purchase. During each service, i make the dealer aware about the problem i am facing. This time i was told that you will not face this problem as we have checked the carbuettor properly.
But the situation is the same again. There is no minor improvement in the mileage.
I can't imagine that such low level of mileage will be given by splendor. Also, such poor customer service is given by hero which is intolerable.
I request you to please take an immediate action against this.