Microsoft SNDS contact

We've been trying to get SNDS access for our IP space, and we keep running into issues where the SNDS site is unable to determine what emails it should use to authorize access.  SNDS support has so far been very unhelpful, they keep trying to tell us to submit the space as individual /24's, which is less then helpful when we have multiple /18s we're trying to set up. Does anyone have a contact at Microsoft that can help?