davidecarol on "Can't access davidecarol.com"

Hi!
I registered the domain davidecarol.com, and than I cancelled it, in March, 18. Minutes after, I registered it again. And the support told me it will be available to me 15 days after... And nothing happened. I need this domain, and it is paid. What can I do?
It is from my sister's marriage.
Thabk you for helping!