having trouble deleting groups

hi there, i cannot figure out how to delete groups from my account. the problem is that i associated email addresses with these groups, but then i deleted the email addresses from the groups b/c i wanted to make new ones, but i can't since they are associated with these groups still (even thought I deleted them), but i cannot go in and delete the groups. it's like they are in nowhere land, and i am the super admin so i should be able to delete groups. can you help?