removing all spam posts from one user

[Spacehopper]

Sorry I'm struggling to find where you mean, if I select the post then use the drop down menu and click delete this is what comes up:

Deleting 1 post(s).

Delete Options:
'Soft' delete - Leave "Deleted" Message
Permanently remove
Soft Delete will allow the content to be restored later, whereas Permanently Removing the content will permanently remove it from the database. Please choose wisely.

Deleting the first post of a topic will result in the deletion of the topic.

Reason for deletion (Optional):

-------------

There is no option there to delete all of their posts or ban them

Thanks