Cases like this one only shows that legacy banking isn't going away any time soon. Being your own bank is a serious business. It is not a joke.
Can I do anything to return the money?
You can call the police. Nothing else can be done.
Maybe the hacker is very close to you. Does anyone have access to your computer? Do you have a weak login password? Do you have a login password at all? These things happen too. Maybe a friend of yours took a photo of your priv key with his cell phone while you were taking a piss and he decided to rob you after a few days.