BTC transactions are irreversible, and you can only recover your stolen funds if you capture the person who stole it from you and force them to return it to you, now what are the chances of that happening, zero. Another way you can recover your funds is if it is a large amount of money, and you report it to the authorities, if they think it is worth it, then they could confiscate the funds if the thief moves it into any custodial service.
These are the only ways you can recover your stolen funds, so any service telling you they can help you recover your money is a scam.