The original platform is changed to another one. My operation on the new platform is accused of illegal, and need to pay 20% of the violation fee

I was guided to register at BKYHYO by a Netizen. This platform migrated to GSM (Grand Signal Markets Limited) without warning. It is an unregulated platform. It is confirmed that the customer service GSM will upgrade the main standard and deposit money again. However, it is told that someone else has made a deposit, which is an illegal operation and needs to pay 20% of the fee to recover the account. At present, the MT5 account has been disabled, and the new platform GSM has no EMC pipeline. So I need your help.