File I bought still has "AudioJungle" watermark

Says everything in the topic.

Did you mean audio watermark still appear after you download the archive files (ZIP)?

I suggest you can send a message the author about this one…
And don’t forget to attach the screenshot of your purchase invoice to them.

It’s rarely happens actually, because as we know every items are sold here is going to review by Audiojungle team. And I am sure they check the containt of archive files too.