How to get back a blog which had been accidentally deletedThis is another problem because the "Save Settings"
in Settings > Basic (default)
are so close to each other and it is understandable why sometimes careless bloggers accidentally click on the wrong button.
Some reassurance about deleted blogsPreviously, when a blog is deleted, the blog URL is released to others to grab. In the past this had led spammers to grab the blog URL to take advantage of its history, that it had already been indexed by search engines and also probably because the blog also have respectable Google PageRank. In fact, many suspect these spammers have robotic programs to grab a blog URL the moment it got release to everyone. The blogs they set up are referred to as spam blogs or splogs.
The old advice was Why you should not delete your blog or change its URL (click BACK button to get back to this page). This no longer apply to blogs you delete yourself as they are reserved for you to claim back later. However, it is still applicable if you change the blog URL as then, the blog URL is open to everyone to grab, including spammers, and if you have been giving the blog URL to family, friends, colleagues, etc., it can be very embarrassing if the spammers put pornographic material into the blog as that blog is still associated to you in their mind.
How to get accidentally deleted blogs backThe first step should be to try to contact Blogger Support (click BACK button to get back to this page). There is another old post Contact Blogger Support old post. Both had to be edited many times as Blogger Support keep changing the goal post.
The latest is that you should only contact Blogger Support regarding for account or TOS-related issues. Wonder if deleted blog is included in these issues. Will try to find out.
For other problems, and probably also for deleted blogs which you want to claim back, post your problems to Google Blogger Help group. Try to catch the attention of one of the Blogger Employees and if they see your appeal for help, they can help you get your blog back. Remember to give your blog URL. See Asking for help: Some advice (click BACK button to get back to this page).