I would call the admissions office on Monday. See what their policy is on the interview, and whether there are any steps you can take to meet with an alum. I got a Brown interview in January too, but it’s not a big deal if you aren’t contacted. My interviewer actually told me that what he said he said really didn’t matter, and that it was supposed to be more of a question-answer session for me.
If they’re too busy to give you an interview, they won’t hold that against you.