I did mine there in the same general timeframe. I don't remember all the details, but I do remember that there were a number of things you had to do, and that it wasn't always complete obvious what they were talking about.
You received notice for "activating your kit", so it kind of sounds like maybe you managed to do everything right. I'd guess that your sample got lost somewhere - either in the mail, or at the lab. It never, ever takes anywhere near this long.
I'd collect up whatever documentation you have about it, and give them a call. They'll undoubtedly apologize profusely, and then send you a replacement free of charge.