Unknown Subscription Charge with no Invoice

Hello friends.

My credit card is being charged since some time by a weekly charge of an unknown Apple subscription which mentions no details of the app or service subscribed.

That subscription is also not appearing under my active subscriptions in my ID.

Also no Invoice is provided in email from Apple like with my other active subscriptions.

I am not in US and there is no Apple service provider here. Also Apple USA has no free email support so I am unable to ask them.

Can you advise how to trace this charge?

Thank you and regards.