I want to cancel my subscription and refund

Use this link to read about how to "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.

Work your way through the steps in this link "If you see ‘itunes.com/bill‘ or an unfamiliar charge on your bank, credit card, or debit statement" - https://support.apple.com/HT201382

Prime suspects for unusual charges are subscriptions and purchases made by family members under Family Sharing (if applicable) will not show in your purchase history but may appear on your payment card. You need to ask other Family Sharing members about those.

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: https://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.

Request a refund for apps or content that you bought from Apple - https://support.apple.com/HT204084

If you still have problems, click here --> https://support.apple.com/choose-country-region/media-services Select your country, then a product.