TFG group harrasment

I have been trying to get my number delisted from debt collectors that Truworths has reported it to for more than 2 years. Truworths took incorrect details form a Mr Johannes Meyer. This person owes them money and no matter how many times I tell them or how many emails I send explaining that I am not Mr Meyer and that I have owned my mobile number for more than 20 years and that their information is incorrect. They keep listing my contact details with Debt collecting companies. I am called every day...I block every number that I can, but the calls are relentless. I cannot change my number as all my customers have had this number for more than 2 decades. Corporate harassment!