Have you kept in contact with them throughout your late payment?
Have you spoken to student finance?
Are you in university or private accommodation?
I'm so sorry to hear this.
Call student finance ASAP and see what they say. I would contact your university accommodation team and explain in detail the situation. Then contact your student accommodation and provide evidence that you are awaiting your student finance.
Also, have you got a student account? This only takes 10 minutes to set up and maybe a day or 2 to be approved. This way you'll be able to go into an interest free overdraft to pay the rent, even if its just a couple months worth of rent. You might also be able to speak to you bank about the interest free loan for students and get this approved sooner than later.
I hope this helps!
Chloe - Official Student Rep