Cheating/ Fraud case

Sir, I have been cheated by a call which ensured that I have seen selected as one of the winners drafted through a lottery by this shopping site ( fashion clues.in) during their online campaign as the company is newly launched so to attract customers they are giving free gifts to those who shopped during the campaign at any of the e commerce sites in India.So they told me to select products and tell them the product code of that product which I wish to buy from their site or paytm above Rs 3000.So I ordered them 3 products over phone of Rs 3031.And made the payment through paytm on their given no. Next day they called me and said that as yesterday I have shopped so I will get a chance to participate in a lucky draw, so I agreed to it and they said that I have won a prize of rs 1,20,000 which I can redeem either through shopping or take cash prize.So I decided to take in the form of cash prize and gave them the bank details for transfer of fund.Later on they called me and said that a processing fee of rs 19,000 has to be paid by me for getting the prize and the prize will be initiated in bank within 30 mins . So I paid the amt through paytm , again after 1hr they called me and said that again I have to pay a service tax of 5% for getting the amt.So at that moment only I refused and told them to cancel the process and refund my money back.So they agreed to do so and told that the money will be refunded in 2-3 days. But still even after so many days neither they refunded the money nor I received the order which I booked over phone.Whenever I phone them and ask the tracking no of the product and regarding the refund they don't receive the call and even if they do so they tell me that they have server problem or they are trying and give days and timings everytime. Please tell me what can be done now so that I can recover my money back.