Do not allow to withdraw after making profit. The paltform also said that I used delay arbitrage

I made money on the ACY platform and wouldn't let me withdraw. They also said that I used delay arbitrage and transferred all the money from my platform account without permission. The ACY platform has been experiencing price differences with delayed quotations recently. I also transferred the money from my account privately, so why didn’t I tell you when I lost money? Recently, the problem of quotation delay is particularly serious. For example, the platform quotation for gold the day before yesterday was 1735. But after the transaction, it becomes 1726. The quotation and the transaction are fundamentally different. If I make money, I won't let me withdraw. Why don't I say when I lose money? I ask the platform to return the money I made on the platform to me.