Hi, and welcome to the Apple (user-to-user) Community.
Re: "Subscription overcharged , when asked Expert Easy exit without any explanation".
Of course, we have no access to your accounts or details & personal details are not to be displayed publicly.
Seems it may be a good idea to first look carefully through your purchase history online:
View your purchase history for the App Store and other Apple media services - Apple Support
Eg: says:
"How to see your purchase history online
- Go to reportaproblem.apple.com.
- Sign in with your Apple Account and password to see a list of your purchases.
- If you're not sure what you were charged for but know the amount of the charge, search for the amount.
Learn what to do if you can't find the item that you’re looking for or if you find unexpected charges."
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Eg: ✽ For a new subscription: You may have been charged for the current month when you subscribed,
and, shortly after, charged for the coming month up ahead ?
✽ We can't tell just what those $63.99 charges in your screenshot were for.
(Sometimes various charges / media-purchases etc. are grouped together in one amount.)
Charges can be for apps, subscriptions, music, film purchases, or more.
✽ Is it possible you accidentally subscribed more than once ? If so, you can cancel a Music subscription.
✽ It's not impossible for scammers / impersonators with access to your personal info. to make fake charges.
These could appear on your card-statement, yet not in your purchase history, (ie: no money went to Apple.)
You would need to talk with your card-provider : more info if you scroll down in User Tip below:
(Eg: User Tip from respected community member: Billed, but you didn’t buy? - Apple Community_ )
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That first linked article at the top also says:
"If you find purchases that you don't recognize or unexpected charges
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If needed: More info / support / contact options etc.
Apple Music Support website: Music - Official Apple Support
Billing and Subscriptions support website: Subscriptions and Billing - Official Apple Support
All the best :-)