Unfortunately i wrote my supervisor begging messages to return money but i have no answer
May be it is possible to hack this bitcoin account somehow?
Why do you talk about hacking account? This is what I don't like about your confused story. When you talk about hacking, it means you have a dubious tendencies yourself. Otherwise, you should be looking at legal means since you know both the debtors and your supervisor in person or traceable.
Hacking is happening on various big exchanges and mining hash buying sites as well. In that meanwhile you are saying loosing the fund with the supervision simply nonsense I think. We do not need to worry about the hacking if that happen.
All you need to do precaution to safeguard your wallet better in future. Nothing else work while you are victim of hacking.