MBD HARRASSMENT

for the past 4 weeks i have been harassed by MBD ATTORNEYS, i dont know where they got my office number but everyday when i get to work i get massages that they called , sometimes they call when i pick up my land line its just mbd voice massage. i tried to speak to they to please change my numbers to my cellphones but thats not happening. i have also explained that i have been on review for the past 3 yrs they said my account was only handed to them 7th May 2021 which is confusing. they refuse to call my DC . now i feel very harassed at work. am worried this may lead to bad impression as sometimes they call very early morning on landline and my boss receives the call.