If you have used a free trial subscription previously for an app, you will usually be charged immediately for a paid subscription if you download the free trial again.
You will need to speak to Apple Support to clear this up. Otherwise, the Apple Account used to download the app will likely be frozen and unusable.
Direct link to Apple Support options -
https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362
World-wide Apple Support -
Contact Apple Support - Apple Support
M1 Mac mini, macOS 15.4.1; Watch, series 10 GPS-only, watchOS 11.4; iPhone 16, iOS 18.4.1; TV 4th Gen, tvOS 18.4, HomePods, audioOS 18.4 and Airport Express w/ Airplay 2