{∅, {∅}, {∅, {∅}}} : Rage Against the Meat Grinder

Thanks,Herr Hauser.Suffice it to say that your plight and I might add,mine too, is that of far worse than Winston Smith's in 1984.
Unknown people knocking at my door,ringing my door bell,call up my phone.I try, as much as possible, to hide and respond to come face to face with the malicious force.

Is there some kind of ombudsman to whom you could write about getting the  invoices scrutinized?