Hello Laclac1508,
Thanks for asking the Apple Support Communities for help with a charge.
1. Please check the info in this article: If you see 'itunes.com/bill or an unfamiliar charge on your statement - Apple Support
2. Also check if the charge is coming from a subscription. Check if there is another subscription, because even if you delete an app, it's possible there was a subscription included. Please check all your subscriptions are cancelled using this article: How to cancel a subscription from Apple - Apple Support
3. If you were setting up a card or account, it may have been an authorization hold which will be refunded. This article talks about authorization holds: About payment card authorization holds from the App Store or iTunes Store - Apple Support
4. This article also has the info and screenshots to show you how things are billed: How App Store and iTunes Store purchases are billed - Apple Support
5. If there was an error, do not worry, you can check this article to request a refund using the emailed receipt: Request a refund for apps or content that you bought from Apple - Apple Support
Thanks and have a wonderful day.