Payment canceling

You do not say where you see this purchase. If it is an e-mail are you sure it is real and not an attempt to steal your private information ('phishing') (very common)?

Identifying legitimate emails from the iTunes Store - http://support.apple.com/kb/HT2075

Phishing & Other Suspicious Emails - https://www.apple.com/legal/more-resources/phishing/

Forward attempts to: reportphishing@apple.com

If you think the charge is real:

If you see ‘itunes.com/bill‘ or an unfamiliar charge on your bank, credit card, or debit statement - https://support.apple.com/HT201382 - "Before you contact Apple to request a refund for a charge you don't recognize..."

Deleting an app does not cancel a subscription if there is one. You must cancel the subscription:

See or cancel your subscriptions - https://support.apple.com/HT202039 - "If you signed up for a free or discounted trial subscription and you don't want to renew it, cancel it at least 24 hours before the trial ends." At this stage the renewal is considered a purchase. For a new subscription the sale is probably effective from when you first agree to subscribe.

If you use Family Sharing and you are the organizer, make sure this is not something purchased by another family member. Subscriptions and purchases made by family members under Family Sharing (if applicable) will not show in your list or purchase history, you need to check these from devices using their AppleIDs.

If neither you nor a family member (if applicable) has a record of this purchase and you only saw it on a statement for a card you alone control, contact your bank or card company about card fraud. Apple does not handle that.

If you do recognize it and have canceled the subscription and wish a refund: Apple's terms of purchase in the USA are, "All Transactions are final" (https://www.apple.com/legal/internet-services/itunes/us/terms.html ), but some countries have different laws so check terms for your country at: http://www.apple.com/legal/internet-services/itunes/. If sales are final then it is Apple's decision if they want to grant a refund. You can always ask, and people do get refunds on a case by case basis, but Apple can also say no. To request a refund:

Request a refund for an App Store or iTunes Store purchase - https://support.apple.com/HT204084

Report a Problem - https://reportaproblem.apple.com/?s=6

If a reporting a problem request is unsuccessful you can also try:

Other ways to contact iTunes Support:

https://www.apple.com/emea/support/itunes/contact.html

or

https://support.apple.com/country-selector/itunes