Ola Cabs — Paid cab charge to driver, but ola still asking me to pay again.

Friday OCT 30 i book a ride on Ola. i took the ride. and after the ride is over the driver insisted on paying with google pay to him. i did and i have the screenshots. i have told old same thing. and now they are asking me to pay again to them. i asked ola customer service for the same via twitter and email and website. their support system is not good. no phone number available for immidieate calls. only support FAQs are available due to which i cannot talk to them. but they say they will only solve issue within 48 hours after that they dont want to solve any issues. how can i contact them without any way to contact them?