Overcharged

this is a user helping other users with tech

questions you are not addressing apple here just fellow users

try

Request a refund for an App Store or iTunes Store purchase - Apple Support

Extra storage is a monthly fee and it's your job to cancel the subscription.

They may refund $.99 for the last month but the older ones are yours.

Unsubscribe, following the steps provided in this support guide:

https://support.apple.com/en-us/HT207594

Regards

Giulio