Scam Broker

I trade in XTI-USD start from $800, and I managed to make a profit of about $12,200, but when I request a withdrawal, my account is disabled by the broker with accusations of trading abuse or whatever it's called, when the margin call, the broker is just silent, at least notify by email that your account will be margin call soon, please make another deposit, but when you get profit, your account is deactivated by this broker with unclear accusations, is this not a scam broker????