410s not working

Hi all – thanks John for the rad plugin.
My site got hacked by I managed to stamp on it before anything happened.

I have a lot of spammy links which are gone but Google is seeing 503s. So, I want to create 410s and let Google know.

I have a bunch of links that follow this pattern:
domain.com/?aamun=morevariables

So I am trying to match on ?aamun and ?pbuuu etc.

I tried this in htaccess like this, but no joy.

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^(.*)\?aamun.*$ - [G,L,NC]
</IfModule>

I also tried querystring matches (no joy). It seems to be able to not extract the ?aamun.

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{QUERY_STRING} ^(.*)\?aamun.*$
RewriteRule .* - [G,L,NC]
</IfModule>

No joy though.

So in Redirection, I’ve added this regex. (I am a total htaccess/regex noob)
^(.*)\/\?aamun.*$ as a 404.
I also tried ^(.*)\?aamun.*$ as a 404 and 410 but can’t get it work (have cleared caches).

An example URL is below. THANKS for any help! ??
(https://www.velonomad.com/?aamun=ct-binary.2414215&catid=15&binary=24142)

https://www.ads-software.com/plugins/redirection/