As far as I know, if you chose to book a room in the con hotel, your registration will only be accepted if you got one.
If all rooms were booked by the time they got to your registration, you'd only be accepted if you either found a double room willing to accept you as their third room mate or if you elected not to stay at the con hotel.
Also from what I can see, there are now registrations on the waiting list, which might also have triggered a status notification.
The only way to be sure what the current status of your registration is, would be to log in to the registration system at
https://reg.eurofurence.org/regsys/ and check your status there (if your registration was accepted, a red link labelled "How to pay" should be showing in the navigation bar to the left) or if you are having trouble with the regsys write a mail to reg@eurofurence.org