Blatant Harrasment

Had a contractual issue with Mondo last year.. my quiry was resolved only in theory...Mondo from the beggining of March this year..refered our matter to what i thought was an esteemed law firm...Blake and Associates..they have called me now for more than 20 Times...keep asking me the same thing...i keep telling them the same thing..blatant harassment ..good people.. I do not owe Mondo a cent...now I flatly refuse to tell them my ID number...believing they should all know it by now...Blake and Associates...you cannot keep doing the same thing and expecting a different result..you just cannot...please