Ola Cabs / Ani Technologies — Extra billing - both cash and ola money

Address:

Bangalore, Karnataka, 560034

I travelled by Ola cab number KA 03 AB 9882 on 4/11/16. The driver collected cash saying that it was showing a necessity for cash payment. This was followed by debit from my ola account on terminating the ride
This is a double chare, and is unethical
Further, i was led to believe that the ola payment did not go through

I want ola to resolve this issue because it is the informal employer of these cab drivers and the company is responsible for such misadventures