Normally when bitcoins are stolen they are difficult to get back, because the thief could be in another country, where your country's law can't touch them.
Bitcoin's aren't difficult to get back when it was stolen, we can't really recover it anyway because it can only be sent back if the hackers that stole your bitcoins will be returning it back to you. I think the only people that you can help you are the FBI and I haven't seen someone that offers this type of recovery services.