Complaint

First, confirm the charge is real. There are untold numbers of false purchase mail and messages being spammed:

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Identify legitimate emails from the App Store or iTunes Store - Apple Support

These usually seeking to obtain your Apple ID and password.

How to check for an actual purchase is described there, and can also be viewed here:

See your purchase history for the App Store, iTunes Store, and more - Apple Support

If the purchase is real, here is how to request a refund:

Request a refund for apps or content that you bought from Apple - Apple Support

Deleting apps is not tied to subscriptions.

If you have an iPad and an iPhone for instance, you might only want the app installed on one.

Click on the following to cancel: See or cancel your subscriptions - Apple Support

Click on the following to request a refund: Request a refund for apps or content that you bought from Apple - Apple Support

ajare wrote:

Can’t I get a refund for the money I was charged for

We are other users like you and not people that work for Apple.

We don’t have access to your accounts, purchases, or other info.

Please click on the blue-text links here, and read, and follow the procedures set by Apple.

We can not determine if you will receive a refund.

Only you can check for the possibility. You do that by following the link posted by MrHoffman above.