I subscribed for eharmony app by mistake. I need to cancel it ASAP. I cant afford the Lum sum payment. I tried so many things till I found out my email on App Store was differed as my gmail. Can you please cancel and refund the fee. Thanks

You should cancel it yourself properly.

Managing auto-renewing subscriptions -

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

Then request the refund directly from Apple Support.

Get Support -

https://getsupport.apple.com/

M1 Mac mini, macOS 12; Watch, series 5 GPS/cellular, watchOS 8; iPad Pro 2nd Gen, iPadOS 15; iPad Air 2, iPadOS 15; iPhone 12 Pro, iOS 15; TV 4th Gen, tvOS 15; HomePods, audioOS 15 and Airport Express w/ Airplay 2