Besides automatic retries can I perform a manual retry?
Yes, you can.
Open the overdue invoice related to the subscription and click the Record Payment > Charge Customer button at the top. Zoho Billing will try to charge the customer’s card. This manual retry is not associated with any of the automatic retries and any automatic retries left will function as usual.
You can use the Payment Failures report to get the list of all the customer for whom the payment has failed.