We are ALL denied access to EVERYTHING

Ugh so instead of saving the new policy I was creating to attach to an EC2 instance to prevent it from being able to access anything except one S3 bucket, AWS saved the DENY policy (here) to an existing S3 policy that is applied to grant access to S3 to ALL the admins, so now NOBODY can access ANYTHING on AWS. I can't even submit a support ticket (that we're paying for). How do we undo this? Thanks!