I would like to refund my subscription

Managing auto-renewing subscriptions -

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

ASC - Late 2012 Mac mini, macOS 10.15.2; Watch, series 5 GPS/cellular, watchOS 6.1.1; iPad Air 2, ipadOS 13.3; iPhone 8+, iOS 13.3; TV 4th Gen, tvOS 12.4.1;  HomePods, audioOS 13.3 and Airport Express w/ Airplay 2

Hi.

You may check this support link Request a refund for apps or content that you bought from Apple.

Hope this helps.