Uber India — Extra money charged in car rental

Address:	Ghaziabad, Uttar Pradesh, 201010
Website:	Uber go

We had used your service on 11th feb, from sec 93 noida to vaishali ghaziabad but your drivers didnt refund us the balance amount of rs. 42 saying that he doesnt has the balance amount.

Why is this that we have to carry exact amount of cash,
This service was used by my parents. And they do not carry pay tm and other services.

They had to pay rs.600 instead of the bill of rs.558.
This is not acceptable.

Will you accept rs.40 less than the bill amount. Then why we are supposed to pay extra if we cant use cahsless services

Is this a penalty for not using cashless service?