MFC - HARRASMENT

I keep on getting telephone calls to my cell number and work number. For a vehicle that is not even mine. I have blocked my cell number, but still get annoying calls They phone my work AND I HAVE ASKED THEM TO PLEASE REMOVE my numbers from their system. Just to get another call again. Upon asking to speak to a supervisor, I am told they cant transfer me. I asked for a number they gave me *** Asheley I can not get through to that number. I am really wearing thin at the moment!!!!!