I want to cancel the recent purchase of AviationWeather forecast
Please cancel my recent purchase of aviatio weather reports and forecasts as I clicked yes by mistake
You are not addressing anyone from Apple in these support communities.
These are volunteer user to user product support communities provided by Apple.
We are all just product users, just like you!
No one here can help you with purchases made from any of Apple's App/iTunes stores.
If you are from the U.S., sales of Apps from any of the App/iTunes stores are final.
However, you can try and contact Apple, yourself, here during regular business hours.
https://www.apple.com/contact/
Good Luck to You!