Cancellation letter?

I've been waiting on my maintenance loan and tuition fee to be payed and I just recieved an email telling me my bursary status has changed. I checked my student finance account and in the letters and emails tab there is a "cancellation letter". I didn't cancel my application and I still attend my university for the same course I applied with. It says that I can't currently view the letter and all my payments are blocked. My application says that it's been approved and it's on the "payments scheduled" status. Is there anything I can do to fix this? To add to this, I just checked the more in depth application status page and it says that they're "Checking details - We need to check your National insurance number before we can pay you.". My NI number had already been entered though. Does this just mean that the NI number is being checked and the payments aren't due to be sent out yet or does the cancellation letter really mean something?