Unable to download free it required Billing Payment (Payment Fail)

From: How App Store and iTunes Store purchases are billed - Apple Support - https://support.apple.com/HT201359

"If a purchase fails to charge to all of the payment methods that you have on file, a negative balance is applied to your Apple ID. You won't be able to make any new purchases or update your apps until you update your payment methods."

Read the links below about various ways to pay for items in the iTunes and App Stores.

- Add a payment method to your account. See this article about payment methods that you can use with your Apple Account --> https://support.apple.com/HT202631 then see this article about how to add a payment method to your Apple Account --> https://support.apple.com/HT201266

- You can use the previous added payment type to go one step farther by optionally using it to irreversibly add funds to an Apple Account balance instead of having the card charged each time.

Click here --> https://support.apple.com/HT208687

If no option is shown to "Add Money to Account" using this method (you only see using gift cards) then it may not be available in your country. Use a gift card instead.

- This article outlines how to redeem an Apple Gift Card or App Store & iTunes gift card --> https://support.apple.com/HT201209

- You could also look into joining a Family Sharing group where the family Organizer's payment method is used. To learn how to join a Family Sharing group, read the section "Join a family group" in this support article --> https://support.apple.com/108380#join

As for the subscription, you may have canceled too late. In that case you will have to pay what is owed and then try for a refund.

Click on this link to review the information in the support article about canceling subscriptions ➔ https://support.apple.com/118428

Notes:

• “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." By using an app like this you are automatically agreeing (always read the fine print) to this happening, are responsible for reading if this will happen, and canceling the subscription before the trial ends. E.g., https://discussions.apple.com/thread/256230049?answerId=261793271022 Exceptions apply in some countries ➔ https://support.apple.com/108098

• Deleting an app does not cancel a subscription.

• Canceling a subscription does not automatically start a refund.

• This thread (particularly posts by Mac Jim ID) outlines complex scenarios regarding subscriptions and trials. ➔ https://discussions.apple.com/thread/256149847