Next steps for proceeding with the FIR

I had been contacted by a random person A who claimed to be from company C(very reputable company) trading in Forex market. He initially claimed that he pool the money from different people and trades the money with high volume in forex market. I had deposited some money to them for trading. Later, he used to ask for more money. And one fine day, after asking technical questions I developed a suspicion that it could be a scam. I immediately asked for the ID of working with company C. He sent me the ID card, which I later verified with official portal of company C's support team. And they denied that the person A works for them as asked me to report to local police authorities in case of suspicion. I lodged the complain using 1930 and filed an FIR. I haven't talked to that person over phone for past few days. But he messages me and calls me everyday. What shall I do next - should I pick the phone and ask for money? In case if he agrees to pay some amount, what shall I do with the FIR report as it's still in investigation stage. Like should I withdraw it or hold it as the person falsely claimed to be from company C.