I think there is not much you can do. There is only one lead - a Changelly withdrawal of 499 with 8f887840957411e7b3a7b3d76ec6c9c2 message. You can try to ask Changelly, but don’t expect anything. You can try to report your case to your local authorities - at least there would be a record somewhere for future reference, again, I wouldn’t expect much.
(frankly, my local authorities would laugh at me - in the rare event if they understand what I am talking about in the first place)