Hero markets LTD scam

I invested 20000$ in hero markets LTD when i want first withdraw they demand 20% statergy when i pay 8500$ as stetergy fee they ask my amount get freezed i have to pay 1000$ as unfreezing fee when i pay this amount they ask my amount is reletive large i have to pay more as unfreezing fee they 1000$ more i ask i dont have they agree to 250$ when i pay this they dont reply please i need help i lost all my money