Hi Anna__82,
You can verify the subscription has been paid for by checking your Apple Music subscription on your iPhone. Here's how to do this:
- Open Settings.
- Tap your name at the top.
- Tap Subscriptions.
- You will see a list of your subscriptions there.
- Tap Apple Music to view the details about when your subscription renews.
If you're experiencing an issue with the payment method you used with your account, reach out to the bank who supplies your credit card. They can look into payments that were made twice.
If you've been charged twice accidentally from Apple, use these steps to request a refund:
1. Sign in to reportaproblem.apple.com.
2. Tap or click "I'd like to," then choose "Request a refund."
3. Choose the reason why you want a refund, then choose Next.
4. Choose the app, subscription, or other item, then choose Submit. If you were charged for a subscription that you no longer want, you can also cancel the subscription.
This information is from Request a refund for apps or content that you bought from Apple - Apple Support.
Regards.