Can't get in touch with Jet Blue to see if I have a seat on a rescheduled flight.?

My flight was canceled on 12/27 due to bad weather. The same flight number is scheduled to depart at the same time and for the same destination on 12/28. Do I still have a seat on that flight or do I have to rebook my flight through their hot line as it was instructed in the FAQ? Call volumes are high and I'm constantly being told to call back later.