Uber India — Regarding extra fair

I booked uber ride on 6th March from ndrf to chandani chowk. I didn't cancel the ride, driver didn't came to my pick spot and I am being charged for 1/3rd of the fair.how can this be possible??
It was probelm o[censored]ber gps system that they didn't show my proper pick up spot to the driver. I even tried to accommodate my pick up spot by walking towards the driver but till then ride was cancelled.how am I supposed to pay the extra charge??