After hours of talking to Xbox Support I was recommended to post here to try and get further help with this issue. I've had my Xbox One for at least 6 months now and I've been invited to the Xbox One Preview Program by some of my friends who are already inside of the program. I've had two of them invite me to it so far. Both of these invites were sent roughly 5 days ago - but I haven't received a message from Microsoft with a link to download the Preview app onto my Xbox One.
I am fully aware, as it states in the FAQ, that it could take a few days to receive the message. But I'm wondering if 5 days has been long enough for the message to have came through. I was informed by Xbox Support Staff that I was invited to the program and that the message should've came through. Not to mention a friend of mine was invited by the same guy, but I was invited 1 hour before my friend had been. And after two days my friend has received the message, but I have not.
I then asked my friend to invite me, but after 3 days still nothing has came through about the registration for the Xbox Preview Program.
Could anyone give me any help as to how I can get my account registered/approved? It would be very appreciated.