Somewhere in the course literature it would have told you about this. You would also have signed up to a student charter or handbook or similar that would have told you the university's stance on working during term time, which usually sets out the number of hours they consider reasonable and that you must ensure it doesn't interfere with your ability to fulfil the obligations of your course. Your job, even though part time, is obliged by law to offer you pro-rata holiday pay, so you may get some money from them depending on how long you have worked there and how they allow employees to accrue leave. It is also possible, but unlikely, that you may qualify for the hardship fund.