What is the company and the tumbling service? How do you know that they hacked your computer? Did you download a virus or something from them? How will they be able to "pin" the scam on you? If you still have the private keys then you can be the good guy and take the coins and send them back to the victims.
If they have installed programs on your computer then you have a virus. Get an antivirus software and remove it. Also, when you aren't using the computer, shut it down so that they can't do anything. If you need to computer on but not online, disconnect it from the internet.
it's a common scam on darknetmarkets.org they refer you to a fake version of helix with a fake helix id and keep it all. I've seen helix confirm in forums that helix id is a scam. And they are the ONLY ones who would do this, I sent them a few worded emails to get my money back.
It is disconnected, the virus is a one time package that was installed and continues to run, i unplugged modem and removed memory card and files were still being added