If you named names here in the forum, that is not allowed. Serious problems with a client are best dealt with using Upworks customer service and opening a ticket.
ETA: It may also have something to do with the fact that you already had a long thread with responses here:
I did not name a client. I also complained about Upwork support as they did nothing to help me with that situation and left me hanging without a proper response for days and then fed me some nonsense.
The problem escalated from that one, as he requested a charge back, so I though making a new thread was a better option. But if that indeed is the reason, wouldn't they just close the thread, not delete it completely?
You need to make sure that you follow the:
Don't take it personally if a post is removed.
I've probably had hundreds of posts removed. It doesn't always mean you did something wrong. Sometimes posts are simply moved or edited or deleted for purposes of clarity and flow.
re: "I hope that is the case, but wouldn't I receive a notification via e-mail?"
Not all the time.
You're more likely to receive an email message if the moderator thinks you did something egregious and need to be informed about the rules a bit.
If your post really was removed without any notice at all, then the moderator may have just been cleaning things up, or may have thought you really didn't need to be told anything.
Possibly a moderator saw the post, about a client, and agreed with you in principle... but felt that the post couldn't be left in place. I never read what you wrote... If it was pretty harsh... maybe there are ways you could post essentially the same information in a more concise and less caustic manner.
Yes, this occurred to me as well. Without any explanation, my post was removed.
Although, it was instated later on a private query to a forum mod.
We expect some explanations as to why the post is removed.