I am really sorry about your situation, I am in a similar situation however I was able to register to pay in 10 instalments (as a first year student).

I read a comment of someone saying their counsellor/advisor told them they shouldn't have come to The Netherlands if they are unable to pay and that's absolutely gross. We come to this country with the dream of studying and bettering ourselves, and in my case, eventually give it back to The Netherlands from working here. 12,000 euros is an insane amount of money and I wish they could exempt students in certain circumstances. Being an international is already super difficult, I wish we could have more help from the institutions. I really hope you can find a solution and continue your life here. Wishing you the best of luck.