Worst Experience with Hyundai

They Misguided and Cheated me saying mileage would be 16 km/per liter but when i complaint regarding the mileage that is below 8km/per liter they said after second service the mileage problem would be fine but after doing several services still i got the mileage 6km to 7km/per liter. i got frustated with Hyundai company after complaining so many times there is no resolution from their side. Last service i have done by Himgiri Hyundai Jhilmil (Delhi). that was worst exprience they misguided and give false commitment. So i aware people Not to purchase any vehicle from Hyundai they just make people fool and giving the false details