Re-use old subdomain name


I used to have a website and worked well. A month or so all of a sudden it disappeared.
Now my question: how comes I can’t remake a website with the same subdomain as I used to have.
When I try to add the subdomain it always says “in use”. Will I never be able to use the old subdomain again anymore or how long do I have to wait before that subdomain will be free again, because I made it and that’s why I get “in use”.

Best regards,

Deleted subdomains can’t be used again apologies