Scammed

Good Day

I made an investment with this company called gainfxmarkets, when I joined I was told I will get my profits after 48 hours but instead of getting it they first asked for conversation fees , after that they asked for ATM card money as they claimed that their platform uses a special card , then they asked for delivery fees , now when I ask them to refund me they are refusing, they say I should first send R50,000
please help as I have lost about R300,000 and I am in debts