Ola Cabs / Ani Technologies — complaint about wrong charging of penalty of rs 50 on my trip on 15.06.19 from tambaram station to rams habitat omr road

I booked a cab on 15.06.19 from Chennai Tambaram Station. To Rams habitat OMR Road around 4 am. Ola allotted 3 cars and they cancelled one car. Second car driver talked to me and came to boarding point. The third car driver talked to me and asked me to cancel the trip for which I refused as I have not booked that drive. The driver of third car on his own cancelled and I received a msg for cancellation charges of Rs. 50. Immediately on completing my trip I informed in the option box abt this and requested to remove the penalty of Rs50 for no act of mine. Unfortunately no steps were taken by you and for my trip from Rams habitat OMR Road to SAveetha pupil school on 17.06.19 I was asked to pay that penalty of Rs 50 and I also paid it. I request you to kindly consider that. 'for no fault of mine I was penalised by OLA for Rs 50. I very much annoyed and I request you to consider and refund Rs50 to me or ADJUST DURING MY NEXT TRIP.

Thank you.