Previously you should be able to recover a deleted post with original permalink together with the comments. However, something has changed and the method no longer works. However, you can still use any of the other 5 methods described in this post - How to recover deleted posts to restore the content, but it will have a different permalink and zero comment, thus having to start from scratch all over.
However, you can still recover your comments because even though the post is deleted, the comments are still saved in the Dashboard > Settings > Comments. The only thing is the comments are in ordered according to time and not according to the post, the latest comment at the top. So you would have to search for those comments which are associated with the deleted post title. So to restore the comments, use the methods described at this post - How to restore deleted comments.
if you moderate your comments via email notifications and you have not deleted those emails, you can also get the content of the comment and repost them as described above.