Accidental Subscription Renewal Pending for Over 48 Hours

Device & Software:

iPhone 15 Pro, iOS 26.0.1

Issue:

I accidentally renewed a subscription.

The purchase is still pending for more than 48 hours.

I have already cancelled the subscription via Settings → Apple ID → Subscriptions.

I cannot request a refund through reportaproblem.apple.com because the purchase is still pending.

Request:

I would like guidance on how to get a refund for this subscription.