Do you use multiple Apple ID?
If you have upgraded iCloud+ plan, once your request for iCloud+ plan has been activated, you should receive an invoice in your email box.
Please check -> Go to -> Settings -> your name -> iCloud -> if you see 50 GB (or 200 GB or 2 TB) then you have an iCloud subscription.
If you have an iCloud subscription, you will receive a monthly bill from Apple, check your email box.
With that 2x invoice, check the Apple ID on the invoice, the Order ID & the Document No.

Then scroll down & see:
👉 If you have any questions about your bill, contact support. This email confirms payment for the iCloud+ plan listed above. You will be billed each plan period until you cancel by downgrading to the free storage plan from your iOS device, Mac or PC.
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My Visa bill shows two $2.99 charges,
If the invoice is not from Apple, was the money deducted by a stranger?
Contact your bank, they can find out who (name, address & account number) has collected the amount from your bank account, and when.
Depending on your bank, they can collect the amount back within 30 days.
See also ⤵️
Identify legitimate emails from the App Store or iTunes Store
Identify legitimate emails from the App Store or iTunes Store - Apple Support
Recognize and avoid phishing messages, phony support calls, and other scams
Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support