Harassment over account thats not mine.

I OPENED AN ACCOUNT MANY YEARS AGO WHICH IS STILL ACTIVE. I DIDN'T HAVE A PROBLEM UNTIL THREE YEARS AGO, WHEN I RECIVED CALLS FROM THE SHOP TO PAY THIS ACCOUNT. THE SURNAME IS THE SAME AS MINE BUT NOT OUR FIRST NAMES. EVEN THE ADDRESS IS DIFFERENT. I BROUGHT THIS INTO ATTENTION IN THE STORE ON SEVERAL OCCASIONS BUT FOSCHINI DID NOTHING. RECENTLY THEY STARTED TO SEND ME REMINDERS AND NOTICES ABOUT THIS ACCOUNT OF MS ( DC ) NKOPANE. MY NAME IS ( PS ) NKOPANE. ...SPOT THE DIFFERENCE. I AM VERY DISSATISFIED ABOUT THE MANNER IN WHICH THE STORE HAS HANDLED THIS MATTER. PLEASE HELP ME.