It seems unlikely that you will recover what the hacker stole from you, even if we say that someone will help you because I have not heard anything after being hacked that the hacker has recovered what was hacked from him.
Maybe learn a lesson from what happened to you, at least you know what to do next time because hackers can attack wherever we are if we are careless and we are not the ones to go around in this cryptocurrency situation.
I am sure ops will not recover a penny from what the hackers alread withdrawn from his stake account and also is likely he may face attempting to forfeit the balance confiscated in the other stake account that has been frozen, and we cant blame the stake security team for any harsh decision as long as there have no violated any of the players right and just helping to avoid a further loss to the hackers.
Another thing else I will like to advise ops is to keep in touch with the support and constantly send them a reminder so that your case will receive attention and possible solution.