I did this on my wordpress site.  Here are my instructions:

https://moz.com/community/q/switched-from-wix-to-wordpress-dreaded-hashtag-url

I'm in the same boat, and even tried the DRIVERS GARAGE solution (which is also posted on quite a few other blog sites).  Unfortunately, that did not work for me.  Neither did the REDIRECTION WP plugin, nor did editing my .htaccess a zillion different ways.  Heck, I even tried creating directories and html files with embedded java.

Here is the only redirection that DID WORK for me (as indicated it would by Peter):

JAVASCRIPT

(1) Create a Javascript file with this code:

var hashesarr = { "#!old-news/chi3":'/new-page/', 
"#!another-news/dkc8":'/another-new-page/', 
"#!something-old/eckje8":'/something-new/' };
for (var hash in hashesarr) {
var patt = new RegExp(hash);
if (window.location.hash.match(patt) !== null) {
window.location.href = hashesarr[hash]; 
} 
}

(2) Save that file to your theme's child folder (so it doesn't get overwritten in the future by theme or Wordpress updates.
I saved my file here: \wp-content\themes\aweseometheme-child\

(3) In your SEO Plugin, or wherever you can edit the home page's HEAD file, add this code:

(4) Test, make changes, try again and PRESTO!

As a disclaimer, I have not yet tested to see how this will affect SEO Pagerank or Google redirects.  I'm guessing I will still have to implement the Sitemap with the UGLY url's per the DRIVERS GARAGE.  But all my client really cared about was that the client's who bookmarked specific pages, or had links pointing to deep pages would be redirected properly.

MY AHA ANSWER WAS FOUND HERE:
http://www.simosh.com/article/cbgaifec-301-redirect-from-wix-to-wordpress.html
(Alex Nikitenko is a genious!)

AND JAVASCRIPT INSTRUCTION HERE:
https://codex.wordpress.org/Using_Javascript