Hi florina1958,
welcome to the Apple (user-to-user) Community.
Re: "I have been billed for services I didn't order."
"where should I address this issue?"
How to see what you were charged for:
If you see "apple.com/bill" on your billing statement – Apple Support
What can be labeled as Apple Services transactions
Music, movies, TV shows, stickers, books, and app purchases (from the iTunes Store, App Store, and Book Store). These are billed at the time of purchase. They can also include in-app purchases, pre-ordered music or movies, and subscriptions that automatically renew.
If you are charged for a subscription you do not want:
you would need to cancel that, so you aren't charged regularly.
If you want to cancel a subscription from Apple – Apple Support
How to report a problem:
https://reportaproblem.apple.com/?s=6
NB: To report a concern about an app, you must provide the URL of the app.
Find the URL for an app in the App Store to report a concern - Apple Support
If needed:
And if money has been deducted (not pending) for purchases etc.:
How to:
Request a refund for apps or content that you bought from Apple – Apple Support
The support websites listed below
have info. / support / contact links (online chat, phone, eMail etc)
Subscriptions and Billing - Official Apple Support
App Store - Official Apple Support
iTunes - Official Apple Support
Music - Official Apple Support
or
See a list of Apple phone numbers around the world
Contact Apple for support and service – Apple Support
All the best :-)