how to get a refund on a app bought on app store that got removed
I've purchased in april a chatbot app and subscribed for a year. This app is now removed from the app store and no longer work and there is no informations to contact the developer.
I'd like to know how do i contact apple support to get a refund and ensure all my datas are removed from app.
MacBook Air 13″, macOS 11.7