FNB Harassment

FNB why am I being harassed by your call centre, calling me from +***, I have answered the phone a couple of times. I have been nice in explaining to the call centre agent that the person they are looking for is traveling abroad. I have had 8 of these discussions, yet every time I am promised that the system will be updated and I will not get the calls again. Now you are phoning my phone and dropping the call as soon as I answer. Please can I withdraw marketing consent because you are just annoying me now. I am not giving you permission to make contact with me. I trust you can have my number removed from your sales teams list