Oxford Publication — Fraud company don't pay 10k

I got work on 6th April. Before payment of security fee they were responding fast, but after that they didn't reply. I thought my money got wasted, but eventually the materials arrive. Customer support is not very helpful. I asked for help because I had some doubts but i got no help so i did it on my own and were paid only ₹7200 instead of 10k.