Harry, when you report a player, a senior member of the Support team has to look at it, not just one of the randomly assigned volunteers who've been recently recruited.
Often, you will receive a message acknowledging that your message has been received, and occasionally asking for clarification. But Support will not tell you what has been decided or what action has been taken.
It is up to you to track whether or not the account in question has been visiting, chatting, trading, tourneying, or swapping KPs with your members and to determine a course of action from there.