Say away

I have been getting calls from Capitec every day looking for some guy, I got a new number from MTN and started getting these calls I understand if it happens once or twice but I get it each and every day and tell them nicely he does not have this number any more they say they will change it now and then the next day I get another 3-5 calls. They only call and don't care about the end user. They say they remove the number or "make a note" but nothing is done