Harassing Calls

I am being harassed daily by the agents of this company looking for an individual that I do not know. I have repeatedly advised the agents that I am not the person they are looking for and I do not know the individual, this was escalated weeks ago to a manager who confirmed that my details would be removed from the system yet I am still being harassed on numerous occasions. If this complaint is not resolved and if I am contacted again, I will be reporting MBD, its agents, its instructing client and/or subcontractors to the relevant authorities.