Which is it, "I don't even use my Apple iPhone" or "I don't even have an Apple phone"? Those two statements are quite different and any solution will depend on which case it is. If you don't have an iPhone, then it would be your bank account / Credit Card has been compromised and you will need to contact your bank immediately.
If you don't use your iPhone, then that would indicate that you most likely started a free trial/subscription that has not been cancelled. For any subscription from the App Store, then review them and cancel here, Not using a subscription does not make it go away. I pay for HBO Max every month whether I watch any of the shows or not. It is up to me to cancel if I do not want to continue and pay for the service.
View or cancel app subscriptions on iPhone - Apple Support
Subscriptions can also be started on websites where they are not managed by Apple, even though the website may have an app. These subscriptions need to be cancelled on the website. For example Netflix and Youtube have subscriptions on their website that you can use in the app on your phone, but cancelling is only possible by going to the website where the subscription was started.
What is the exact description of the charge you see?
If you see 'apple.com/bill' on your billing statement - Apple Support
You can still contact Apple if you wish to talk to someone.
Contact Apple for support and service - Apple Support