Ongoing harassment - wrong contact details/wrong person.

I am constantly getting calls, text messagess and recorded messages telling me to pay my Woolworths card, and these are all addressed to a Mr Mokoena. I am not Mr Mokoena, I do know a Mr. Mokoena and I have never had an account with Woolworths, Truworths or Identity. I am getting calls sometimes up to 6 times a day and even if I block the number they simply just call from another number. I have spoken to them and told them this, but the harassment continues. If I ever had the need for attorneys it would not be this company because clearly they are not doing their job and are harassing the wrong people and will obviously never get the payment because the people responsible for the debt are not being contacted.