Hello  I see the issue now Broadly speaking the Articles for Creation process is requesting that a whole article be approved and published and by definition we dont publish an article to replace another article If you have posted on the Talk page for that article indicating your intentions and have gotten no response I suggest you WPBe bold and just start swapping in portions of your Sandbox version into the main existing article  I suggest you do this in small bitesize pieces rather than enmasse and that you use the WPEdit summary little box below your editing window to briefly explain whatwhy you are changing That way other people can clearly see the course youre taking and why I would also urge you to make sure that material you add is properly WPSourced ideally with footnotes and that you attempt not to remove footnoted content from the current article unless you can state that it is blatantly incorrectmisleading or that you are adding material that covers the same point but is better writtensourced If someone objects to your changes and reverts them then you can start a conversation with that person as to what they do and dont agree with and collaborate to improve the article And if nobody reverts your changes I suppose its winwin then Hope this helps