Telephone harassment

I require assistance as I have been enduring harassment from call consultants representing a law firm for over 7 months.

Despite attempting to block their numbers, I am losing hope as they persist in contacting me. They are searching for someone I do not know, despite my explanations that the person they seek was not using this line and that I inherited it from my employer in August 2017.

Although they promise to remove my number from their system, I am consistently contacted by different individuals from the same law firm shortly after. I am reluctant to resort to insults, but my patience is wearing thin. I receive programmed calls throughout the day, ranging from 6 am to 7 pm, and have blocked over 10 lines originating from 011 020 and 011 025. I am weary of repeatedly explaining my situation and am now in desperate need of assistance.