You can remove releases from the Your Music page of your Record Union dashboard.
Log in to your Record Union account, at the top right corner click Menu(≡) > Your Music > Submitted and all of your published releases that have not been taken down will be displayed.
Go to the release you'd like to remove, click the 3 dots(⋯) at the top right, and select "Take-down"
If you're under the Pay-As-You-Go(PAYG) Plan this will remove the release from all stores and cancel its subscription.
Note: Take-downs are irreversible. After you have removed the release from our website, it usually takes 3-5 business days before the music gets removed from the stores. It's not possible to remove certain tracks on an already published release.