because dirty coins were transferred from your side and there is no exchangers fault.
That's a bunch of BS! There are no dirty Bitcoins, all Bitcoins are equal. You should really stop promoting this attack on Bitcoin by pretending it's normal. It's not.
The exchanger has no access to your funds.
Meaning: the exchanger doesn't own any funds and just uses a third party.
To avoid such situations we highly recommend to make self AML checking before an exchange using existing AML-check services.
I highly recommend to avoid any service that uses arbitrary undefined rules to block your funds.