Ola Cabs / Ani Technologies — Wrongly charged with no reply from customer care

I had availed ola services on May 30, 2022.
I cancelled once as driver asked me to pay ola parking charges cash. But I was charged cancellation fees. Similarly in the next subsequent ride I was forced to pay cash for parking and simultaneously i was charged in my bill also. I had raised complain on the mail id provided but no one responded.

I did not make the bill payment on the due date as no one responded, now they levied fine of 50 rupees. What should I do now, pls suggest.