If domain names are registered through Platypus, we take all possible steps to remind the owner of renewal date.
We don’t pay for renewals until we get paid by the registrant, just in case the registrant has decided to let the name go. (This has happened).
If we pay to renew a domain name we get no refund if the name is no longer required.
To find out is your domain name has expired, check a whois to see if its status is “Expired”. (e.g. https://whois.melbourneit.com.au/).