I have a weakly payment that does not appear on my subscriptions (MQZ7166DX0a0).

See the Apple Support article(s) below. Link to contact Apple Support in the article.

Apple ID - If you see ‘itunes.com/bill‘ or an unfamiliar charge on your bank, credit card, or debit statement.    *

Hi! You can try to check your purchase history as well to see the order number.

Also, if yiu received an email about the charge, usually the apple if who made the purchase is showing up.

If we cannot locate the charge, check if someone else is using your card or account.