Common reasons for denied creator authentication applications are:
You have not uploaded at least 2 original works
You have not yet reached 25 followers
The content on your Audiomack profile doesn't appear to be original content under your own creator identity (this is due to use of artist names, titles, album art or likeness displayed/contained in your uploads).
Audiomack does not tolerate copyright infringement OR artificially inflating plays. Failure to comply with Audiomack's Creator Program Rules results in revoking uploading privileges, suspending uploads, and banning accounts if necessary.