How do I identify the account responsible for iTunes charges on my credit card?

Re: "Recently, I’ve noticed that I’ve been charged around $5 several times a month by iTunes. I didn’t subscribe to any service, but it’s possible that someone else did using a different account, as we’ve been using my credit card for subscriptions on multiple accounts. I would like to know which account is responsible for these charges. The only information I have is the reference number and the amount paid. Can anyone tell me where I can find this information, or who I can contact to resolve this issue?"

Apple support's online article: If you see 'apple.com/bill' on your billing statement - Apple Support

Eg: says:

"How to see what you were charged for

1. To see your purchase history, go to reportaproblem.apple.com.
2. Sign in with your Apple Account.
3. A list of purchases appears. To see family members' purchases, select the Apple Account button and choose a family member.
4. To see the full receipt including tax, tap or click the date. Multiple purchases, including subscriptions, might be grouped onto one charge.

If the charge is for a subscription that you no longer want, you can cancel the subscription.

Find out where else you can view your Purchase History."