Refund
Is there any possibility get refund for an app which is subscribed for the trial version.but my full yearly payment has been paid for the headway aap
iPhone 8
You need to cancel a trial subscription properly before it converts.
Managing auto-renewing subscriptions -
http://support.apple.com/kb/HT4098
Cancel and use this form to request a refund;
iTunes Support form -
https://support.apple.com/en-euro/itunes-contact
ASC - Late 2012 Mac mini, macOS 10.15.4; Watch, series 5 GPS/cellular, watchOS 6.2; iPad Air 2, ipadOS 13.4; iPhone 8+, iOS 13.4; TV 4th Gen, tvOS 13.4; HomePods, audioOS 13.4 and Airport Express w/ Airplay 2