Uber India — cancelling ride and then came to pickup

Address:

Ghaziabad, Uttar Pradesh, 201014

I booked a ride for my guest from nyay khand 3 to sarai kale khan railway station, driver cancelled ride in app and he came to pick up point. Completed the ride and when asked for bill he said rs 1200 and my guest paid that. Later when they said that we have paid rs 1200 in cash (Its too much expensive) i got surprised about the charges and thought to go in app and see the amount and raise a ticket. But then i saw that ride was cancelled by uber driver.
This is very disgusting and unprofessional.
I am not going to use this app. Earlier i was using ola but yesterday i thought to book it from uber and this happens.
Need my money back anyhow otherwise i know how to take it.