I've sent mail to their support 5 hours ago:

Hi,

I am long time customer who had his acount terminated because of not verifying in time. You can read about my story here:

https://steemit.com/bitstamp/@codemojo/10-btc-seized-by-the-us-government

I understand I can't get my BTC back, but what about BCH that I got for free?

Best,
Jure