Calls frequently with different numbers

Someone from this number called me well over a year ago, and now just called me this morning again!  Once again they said they were a document dispatch service and told me to call a number that they provided, to avoid further action from this so-called "other"ompany.  You can't call the number back because if you do, it says this number is disconnected or is no longer used.   I've had enough of this crap for a lifetime and now I'm going to report it!!