Calls every day for Mr Bongani- who is Mr Bongani??

For +/- 3 to 4 weeks now I have been receiving a call EVERY SINGLE MORNING between 7 and 8 from someone at Foschini looking for a Mr Bongani. I have asked them nicely in a polite manner to stop calling me a d told them that this number has never, in the last 17years belonged to a Mr Bongani. I am now at a point where I cannot take it anymore. Its getting out of hand now. What to do???