If the customer is fail to renew the domain name despite of three-notice period. The registrar shifts the domain name into the redemption grace period.
The redemption grace period is the last chance to renew the domain by paying some additional charges. You can view the domain during the registration period.
If you have still have problem, please contact Customer Support to begin the retrieval process. You can get renew the domain with the registrar by paying the additional fees.