Reliable Institute - No refund received

I was in search of home based job so I came across an advertisement on OLX about typing job, then I contacted them and they asked me for ₹**** deposit, then I negotiated and I paid them ₹*** as a deposit. They told me that they will provide me with a book via courier and I have to rewrite that book. But the next day they didn’t send me any courier receipt and then I called them asking for the refund. They told me that they will refund my money but till date I haven’t received any refund and there is no response from there side. I called them almost *** times but there is no response.