I had an account, which was attached to the domain I’m requesting to use now. I deleted that account months ago. I understood it that if the account was closed for more than 30 days, the domain would be free to use again. How do I get back ownership of that domain?
Note that the 30 days refers to the period after which an email address becomes available again to create a new account or the timeframe within which deleted free sites/accounts may be reactivated by staff.
PS: You mention “custom domain”? What was the address of the domain? Did you delete a paid plan? If you’re talking about a free subdomain ending in .blog or .wordpress.com as @staartmees says domain and content will be gone.