Refund. I have installed turbo vpn app, I just try trail version, I did not use even a day, I uninstalled the app the app that self. Please refund my amount 919 rupee back.

First, you need to cancel the subscription in your account details. Deleting the app doesn't cancel the subscription.

Managing auto-renewing subscriptions -

http://support.apple.com/kb/HT4098

Then use this form to ask for the refund.

iTunes Support form -

https://support.apple.com/en-euro/itunes-contact

ASC - Late 2012 Mac mini, macOS 10.14.6; Watch, series 3 cellular, watchOS 6; iPad Air 2 & iPhone 8+, iOS 13; TV 4th Gen, tvOS 12.4;  HomePods, audioOS 12.4 and Airport Express w/ Airplay 2