Hostel owner not returning my security money after leaving hostel

Hii I am Simran and I have come to Jharkhand for further studies where I have taken a hostel for rent for which I have paid the amount Rs 16000 online including Rs 8000 as security money . After sometime, I realized that hostel is very far from my college and I have decided to leave hostel just after 10 days . So my father called the hostel owner to leave the hostel from tomorrow. He didn't refuse at that time and said he will refund all the money except of 10 days. When my father came to shift me then he didn't arise any question. But after shifting me to another hostel,my father demanded him the money then he totally refuses to return the money. So my father returned to Bihar. After so many requests of my father on phone calls,he agreed to return atleast security amount i.e.,8000 but in cash not online.So my father told me to take the amount. On the way to hostel I have called him that I was coming but he refused and said he was not in the hostel so that I have returned. After a week I again called him in the morning to inform him that I was coming today but he didn't pick my calls . So I have called him from my friend's phone no. and he picked call . When I told him that I wanted to come to hostel and wanted my money then he shouted on me and used very rude language and cut the phone. What can I do now???