While the statement may say iTunes, that doesn’t mean it is for music, or the Apple Music subscription. It can be for other purchases or subscriptions.
If you see 'itunes.com/bill' or an unfamiliar charge on your statement - Apple Support
See your purchase history in the App Store or iTunes Store - Apple Support
All items that are billed to your Apple ID account, will be specified in the purchase history, including subscription fees. Please verify that.
View, change, or cancel your subscriptions - Apple Support
All subscription that are tied to your Apple ID account will be specified in subscriptions overview. If Apple Music is not listed there, then there is no paid Apple Music membership registered for your Apple ID account. Please verify that.