We are actually going to be removing the support system in a future release. As an alternative, you could use third party systems via APIs, normal email, PM system, or even create a forum where only the original poster and your staff can see posts. There are lots of ways to communicate in private to your members 🙂
When you say view complains, are you referring to the report center? You would also be able to select moderators too if they have permission to manage reports.