Coin option trading company scammed me

Agent_Calvin of coin option trading company proved to me that they are scammers, I first invested $500 I was expecting to get a profit after 3days, he told me that I qualify for a 24hours promotion which I invested $300. When I have to cash out he told me to pay $800 as a withdrawal fee and cash out after 20mnts upon deposit, after I made that payment he told me to pay $500 as a activation fee after I paid it he still wants me to deposit $800 so I asked for my cash back which he told me he can't