Hi, I'm Bhavik. Welcome to JustAnswer. I'm reviewing your question now, and will reply back ASAP.
On the wemail page, go to "Manage Folders" on the left side. Each folder that has mail in it can be emptied by clicking on the little icon in front of the folder name. Do the deleted items folder last, as all mail deleted from the other folders will end up there.
Click the "Manage User" link next to the email account you wish to delete in the "User Management" window.
Select "Delete," and press the "Update" button.
This option is visible when you login to your Road Runner master user email account.
May be your account type is different. Look for the Empty Inbox icon on the manage folder and click on it. It will delete 1000 emails at a time .
You should see screen like this
If you want, I can remove them in the mean time . But for that you will have to share your id and password.
Can I login to your account and try to delete them ?