FNB keeps calling me and asking for another person

For more than a year I've been getting calls from FNB and then they ask to speak to a Shaun Koekemoer. They obviously have the wrong number or this Shaun gave them the wrong number as I'm not even an FNB client. I've gone through countless transactions for this person, from him buying a car to him getting a new credit card to ***** on his card. <br> <br> When I tell the agent that calls this is the wrong number they promise to follow up. Then afterwards I get an sms saying \Hi Shaun