Booking cancelling

I had taken test drive Three Times to convince myself to take delivery of the GTX Plus AT , which I booked pre-launch. Unfortunately, more I drived, more dissatisfied from all angles. Cost is too High - Top Model 20.50 lakhs. Fuel average not more than 9 or 10 KMPH when I reset to Zero and tested myself. Seating in both rows is very uncomfortable. Navigation is very confusing. HUD is distracting during driving. Sun-Roof is First Manual opening & then Electric . Diffrent drive mode could not be tested during test drive, so not sure about their performance. Test vehicle Tyre pressure shows 47: 45:41: 46. Sales man told that they will get adjusted in Workshop. As its a wrong measurements. Its a complete waste of money and will be proven a complete failure vehicle. Adding 1.5 lakhs, I will go for CIVIC which is a luxurious and full comfort car in but that too when will be available in BS-VI engine only.