Blogger account is associated with a Google account. It is not rare to hear a blogger screaming for help after he deleted his Google account for that deletion will affect the Blogger account. So what should one do if one accidentally deleted the Google account? One should immediately report to Google Account Contact Form. There is a window of about a week to appeal, after which the Google Account will be permanently deleted.
Google Account deleted, cannot access blog, what to do
How to delete Google account