Irritating phone calls

I get between 3 to 5 phone calls a day from Norman Bisset telling me that I’m someone else with a capitec account I have never had a capitec account also the person they are looking for is my friend and they don’t have his details only mine so I have told them on numerous occasions to get rid of my details I have now had enough of the harassment get your information straight my friend sorted out the account and also the account is closed. One more phone call I will sue them for harassment