Harassment

I am getting threats from a company call vvm on behalf of rcs they have sent me an sms stating that they will be tracking my ex husbands account via my itc beauru information, I spoke to Lisa who I explained to her that I have been divorced from this man for 9yrs he has been married for this entire period to a new wife why am I being harassed, Lisa sed she removed my cell number this morning I get another call now from Emmanuel who once again requests to speak to my ex husband. He also now says my number is off the system, I am sick of being harresssed over an account that isn't mine. Stop this immediately