Uber is now compliant with RBI rules. Now you cannot book ride directly using your credit card. Now you will need a PayTM account, where PayTM wallet can be charged with any payment method be it credit card, debit card or net banking.
Read here: How to sign up using paytm wallet and get Rs 300/- as sign up credit.
Read here: How to sign up using paytm wallet and get Rs 300/- as sign up credit.