Uber India — Why pay for drivers mistake?

Address:

Hyderabad, Andhra Pradesh, 500003

I booked a cab..the cab guy reached nearby n gave me a call.I tried to explain him my exact location..he wasn't able to understand any language n finally he hung up the phone I kept calling him back several times n he never answered n now when I book my next time I'm asked to pay rs 100 additional for the previous cancelled cab. That makes no sense