Uber India — unfair hike in price by uber

Address:

Gautam Buddh Nagar, Uttar Pradesh, 201308

I booked a ride from greater noida to katwaria sarai, on 16th may, 2018, and the fare was 518. While on the way, i decided to change the drop point on the route to sda, which 3/4 km before my original drop point. When i applied for change of location, though it is on the route and shorter, the fare increased to 558. Though this is unfair i accepted, but when i completed the trip the fare increased to 632. This is completely unethical, the company cannot change the terms by it's own. When i complained the representative wrote back saying that the hike is because location got changed. How can their be a hike if i get down on the route 3/4 km before the drop point? I expect a refund and an explanation why such wrong business policies are being followed.