Hyundai Motor India — poor mileage of i10 grand magna automatic

Address:	New Delhi, Delhi, 110087
Website:	Hyundai motors

I purchased my Hyundai i10 grand magna automatic on 1st Oct 2017 . I've a habit of checking mileage and with first tank filling I'm noticing extraordinary low mileage ranging from 6 To 8 km per litre. I compiled to Hans Hyundai Moti nagar dealer but I was told that mileage will increase after first service but even after that it is still giving me 7.5 to 8 km average.
When I visited customer Care unit of Hans Hyundai every one was trying to convince me that there is no issues in car . I m surprised when VP of company Mr Vikram Singh Suri came . I've never seen such disappointing person who is rude in behavior at such senior level. He don't deserve to be at such senior level when he doesn't know how to behave with customers.
My problem is still not solved and I feel cheated that after claims of 18km PL by company cars are giving half the mileage and worst part is that dealer is not bothered.