How can I get my subscription invoices refunded using the API?
You’ll need to get the payment_id for the invoices you want to refund then use the Refunds API to refund the payments.
To get the payment_id you’ll need to take the order_id for the invoices you want to refund and call BatchRetrieveOrders with those order_ids. In the orders response will be the payment_ids for the invoices. You’ll then pass those IDs in the CreateRefund request. 