I Am a University Student

So recently, I just recieved a letter from my university in coventry, saying that I owe £9,000 and the explanation that was given, was due to the fact that I had previously restarted into a new course in 2014 after changing from my other course which was fine art and illustration. Using one's year worth of student finance, then the new course I had transferred to? gaming design. I had failed, which another year's worth of student finance. Once I had failed that, I started again, this year I had passed all my modules but they explaned that they couldn't pay for my tuition fees this year, as I had already used up three years worth of student finance, therefore I would need to pay my way through it....now the issue is, they had only recently just told me this and it's almost september, I had been recieving letters regarding this outstanding payment and I'm honestly not sure what to do. if not paid, I won't be able to re-enroll or carry on the second year of this new course. I'm honestly not sure what to do, I'm in no position to be paying £9,000 out of the blue.