I’ve asked to change my Apple ID account several times. Is it too difficult to understand ?

1) You are not providing enough information about your objective. I can think of half a dozen possible things you may mean but there is a limit to the length of reply I can post.

2) You have marked a reply as "Best answer". In this case yours. That means you have found the solution in your post saying "Change my Apple account," and that the issue is resolved.