Swiggy — order cancelled by vendor

Address:

B91, GF, South City 2, Near GEMS School, Gurgaon, Haryana, 122018

Date: 29 Aug'19
The sector of my address in Swiggy app pick up automatically. It does't allow to change it and because of this one my order has been cancelled with a cancellation charge of INR 60. When I spoke to help desk they informed me that they can't refund the full amount which was INR 150. Now where is my fault in this? Made payment online Didn't ask to cancel...then why i am being charged?? What If i have made COD? Will you still be able to take cancellation charge?
All I need is the full refund of the amount.