In general, the best course of action is to ping a moderator in chat – or failing that, raise a chat flag. All network moderators would be able to help you with this. (Though meta's never a bad bet; the three Retrocomputing mods get notified when a question goes up here.)
If you want to prevent a room from being automatically frozen or deleted, posting ...
Would it be better if you now modify the original question to include the clarifications, on behalf of the questioner? This seems more in keeping with the intent of comments, which are not meant for extended dialogue.
This would make it much easier for anyone reading the question in future to understand without having to read through the chat or the comments....
I mean, it certainly works. But the best way is to post some messages every so often so it never gets frozen in the first place.
Alternative methods of notifying a moderator include, but are not limited to:
Flagging one of your own posts (use sparingly).
Posting a comment on a moderator's post.
Finding a chat room a moderator is in and pinging them.
If we ...