Nedbank's insistent phone harassment for loan

After repplying stop to one of Nedbank's sms'es regarding a loan from them, they have been harassing me with phone calls from two different numbers - one a Durban number and the other a Johannesburg number - for months. Numerous times have I informed them that I am unemployed and have never app**** for a loan from them or anyone else to which they each time promised to "make a note of it", but they kept calling me at least three times a week. Last week I even told them that I will go to hellopeter if they don't stop calling me. They called me again a few minutes ago. I don't have any accounts at Nedbank. I want my name and contact details removed from their calling list. How many times must I explain that I am not employed and didn't apply for a loan. Stop harassing people for loans they never app**** for and don't want.