I've raised £750 to Help pay deposit on university accommodation

My name is Jordan Alexander i am 22 years old and i will be studying dance in london from september onwards, yesterday i receved a email telling me that i need to pay a £250 deposit on my student accomidation then a further £500 advanced rental payment by the 20th of next month, this just isnt possible as i live at home alone with my mother and i am currently unemployed, i used to work as a dance teacher in my local area and had to leave that job for peperation for my move to london to study, without this payment i will not be able to study dance and further my carrier in what i love to do. Any bit of help would be apperciated as i have worked so hard to get to were i am today and moving to london would be the next step in my carrier.
Thank you for taking time to read this,
Mr Jordan Alexander