Sending private messages when someone has closed an active thread
So, recently a past employee closed a thread that had started a year ago, but had recently been very active as new informaiton had just been released. Since the active thread was inappropriatly closed (and inconsistently since there are other threads on the same topic that are still open and haven't had comments for a year), I could not ask the for it to be re-opened on the thread itself. I messaged him to ask him to reopen it. He said that I should start a new thread, which I have, but also said that no one is allowed to send a private message to someone without permission.
So that doesn't make sense to me. What is the point of offering a private message system if no one is supposed to use it? And what were my options to communicate with this person if not by private message? I didn't feel it was right to ask this person to re-open that thread on another thread, for example. Was I supposed to report this behavior to the admin? What are my options when a thread is incorrectly closed?