University Of Calcutta — Refund issue

I was admitted to khudiram bose central college on 1/09/2021 but then on 28/09/2021 I rejected the admission application of this college for admission in another college, and applied for refund. But still I haven't get refund from the college. I have been in touch with the authorities of this college for a long time for a refund, they have promised to return the money but have not returned it yet. I am a middle class girl, I was admitted with great difficulty to raise money but I have not returned the money yet. Please help me, I will be obliged.