Uber India — extra charges for cancellation

I hired uber cab today from pimple saudagar pune to salisbury park. The actual fare was 402 but i was charged 466 rs. For some cancellation which i m not aware. Even previously we had a problem with uber. This is absolutely not done. Already we are paying higher charges and then we are asked to pay extra irrelevant charges. And why should we pay for cancellation. We cancel only whn the cab fails to arrive at the right time. Please give your explanation immediately on this.