The way I can tell is that when you try to call/chat with an advisor, it brings to an error page that says the advisor is unavailable and invites you to "try many of our other advisors!!" something like that. Also if you're using your laptop/desktop, it'll show the word "blocked" in the web address. Also! If you try and ping them it doesn't go through (though, I think this could be incorrect because the advisor has to have ping set up first in order to receive pings, but I do know that if they blocked you, you can 't ping them)