scam.

I was doing small small trading on their platform by buying units of 0.01,0.02,0.04,0.06,0.08 and thereby I made my account from 3000 to 7000 USD. Now when I requested for complete withdraw of my fund, they (Customer Service guy named Aaron) said, it will take 3-7 days and then within 30-minutes, he dropped me a message that my account is gone in -ve. How it is possible? Very simple, they logged into my account (They claim, they dont have credentials of their users).