Phoning me day & night for over a week (wrong no)

African Bank has been phoning me for over a week now every single day and every single night asking for a Marileze Janse van Rensburg. I don't know anyone by this name and even though I've told them this nicely and asked them to make note of this on their computer I am still getting calls every day and every night without fail. I've just received a call now at 6.40pm on Monday 30 March after the guy who phoned me this morning had solemnly promised me that I would not receive anymore calls from African Bank and so I have now just had enough! The callers representing African Bank refuse to let me talk to management to sort this out. The one tonight was even cheeky enough to tell me that SHE was the one calling ME so I can't ask for management!!!! Looks like this is just an easy way to 'trace' their customers.....by just phoning the same incorrect number every day and every night.....surely African Bank should look at getting more competent staff who can think that EXTRA step and start really LOOKING for the customers! I think they are paying these staff members to do squat!!!!! If this does not stop now then I'm going public with this matter!