If your domain has expired and has been deleted from the registry, it is technically no longer your domain. It was deleted and released publicly for registration as a new name by anyone. It is not suitable in this situation to submit a domain dispute, which is only relevant when a domain has been illegally transferred to another registrar.
You can contact the current owner of the domain name to see if they are interested in selling the domain to you. More often, they have purchased the domain, but perhaps they do not have any plans for using it.
Alternatively, you may want to consider registering a new name with an alternate spelling (or add “site” to the end for example). Or perhaps a different extension would meet your needs, such as .biz or .info.
It is important to understand that once a domain expires and goes into the available pool of domains (public domains), anyone can register the domain as a new name. You are no longer the current registrant, and you may not have any rights to the domain even if you were the previous registrant.
It is therefore the best option never to let your domain name expire. Even if you don’t need it now, you can still register and reserve it for future use.