Will my money be fully refunded for accidental subscription?

Did you request a refund?

Look here, you can

• View your purchase history

• Cancel a subscription

• Request a refund

• Verify unfamiliar charges

• Add or remove a payment method

Subscriptions and Billing - Official Apple Support

This is a user to user forum, no one here can tell you what Apple's decision will be. You will just have to wait and see if your request is a valid one.

That is up to Apple to decide.