Is there something wrong with your release after it appeared online? You can change a number of things through your account, for example the artwork, the audio files, the title of your release (if this continues to match the data on the artwork), song titles, the label name, the genre, the selling price. Business that CANNOT can be changed: the artist name, the UPC or ISRC codes and the order of the tracks. You may also not add or remove additional tracks afterwards.
Once you have made the desired change, resubmit your release to all platforms where it was originally sent. You do this via the 'update' option on the 6 tab of your release.
Keep in mind that it takes some time before all platforms have processed a change. Is your change not visible after 14 days? Then take it contact us.