how to restore my deleted comments

hello???

WordPress does not have a recycle bin feature.

Unless you backed up your database and these comments are in the backup, you cannot undelete them. And even if you do have your database backed up, it would be difficult to reinstate specific records from it unless you really know what you are doing.

I just deleted some 450 comments when I attempted to remove an unwanted poster/consultant. Given that our organization spent some $900 on added this posts from another site, it would be great if we could undelete them!!!
Thanks in advance for your assistance.

Oops, I meant to say, “posts” not “comments”.

>it would be great if we could undelete them!!!

I suppose that your best chance is to contact your web host and ask them to retrieve data from a backup tape. It’ll probably cost you around $100 with no warrantee.