Hey there! Nice to meet you!
Manual account closure can be deleted within a 30‑day grace period, as stated by Microsoft: https://support.microsoft.com/account-billing/how-to-close-your-microsoft-account-c1b2d13f-4de6-6e1b-4a31-d9d668849979
Since you received the error message that your account is not recognized when you tried to reopen the account, I'm afraid this means the account closure is complete, and it can no longer be recovered: https://support.microsoft.com/account-billing/reopen-your-microsoft-account-52d7f36e-4c2f-489a-8584-de5fc7918362
Thank you for your understanding.
Best regards,
Darhyl