Scope
Is there an identification/id to map the disputes to invoices?
How to identify the invoice related to the refund?
Chargebacks are directly handled by the payment gateway that you use (Eg: Stripe) and as a merchant, you would directly receive a notification from the gateway regarding these.
If you have received Webhooks from Stripe for refund transactions, then search for "balance_transaction": "txn_xxxxxxxxxxxxxx"
This is the transaction id present in Chargebee.
Go to Chargebee site -> Logs -> Transaction and search for the specific transaction id. 
Open the transaction and click on invoice #. It will open the respective invoice. Follow these steps to ensure the refund is manually recorded for this specific invoice
