TVS Motor Company — tvs jupiter mileage issue

Tvs jupiter i took 5 months before till now there is no mileage upgrade in the scooter, now presently i only getting 35 to 36 km/ltr. Which is unsatisfied as per the company data it will give almost 65 km/ltr, now i only getting 36km/ltr which is half off company said milage, as mien 2service is over, service people say it i'll get set after engine set, till now there is no improvement i ran almost 2848 km..
I request you to please go through the issue.
Owner : md tauqeer hussain
Mail i'd: [protected]@gmail.com
Mobile no: [protected]