Upset non client

African bank has been calling my number ********** 616 for about 3 months now asking for a Mr Leepile .. in each and every call i clearly state that I've been using this number since 2005.. one consultant advised me she will remove the number from our data base.. to my surprise a week later another missed call and voicemail asking to call them back which i did.. and advised "again" the consultant " i am not an african bank client" he said he'll remove my numbers from the data base.. and then again today yet another consultant calls thru 19: 28 asking for Mr Leepile.. i must say this is irritating and it seems like it will never be resolved. I'm very mad at african bank that they make promises and not keep them. I'm really tired of receiving calls from you especially knowing very well I'm are not an African bank account holder ???