Pre paid card is non refillable and has no money on it

The only way to remove it, is to add a different payment method.

If you have gift card balance on your account, it should use the balance automatically, before trying to to charge the existing payment method.

click here ➜ How apps, content, and subscriptions from Apple are billed - Apple Support

If you added a 3rd party gift card (not Apple) as a payment method to your Apple ID, you will need to add a new payment method before you can remove the old one, specially if you have active subscriptions.

Add a new payment method first to your Apple ID, and then you should be able to remove the gift card.