I do part-time copywriting work and over the weekend I wrote a ~1500 word paid article for an online publication. It was a lot of research and toil, I had half a day to do it and I finally submitted the thing at 2am on Sunday. It was a very tricky piece.
Now I notice the article has been published, with some minor edits, but under a different name. The client has used one of their own employees as the author. I wasn't aware that I was ghostwriting. Should I raise this with the publisher? Should credit not be given where it is due - or should I remain quiet unless I irritate them? I'm quite new to this but should they not at least have said it would be credited to someone else?