Miway have rude agents/callcentre and can't take no for an answer

PLEASE can miway remove my telephone number from their database and NEVER call me again? You or one of your agents phoned me and just can't take no for an answer. What is more disturbing is that on Monday (1st call) I asked that she phone me back later as I am on the clock (working). She simply said "But I have you on the phone now". She has no respect for my time. You can expect people to get mad and curse over the phone if you are unable to listen when we says "NO, I'm not interested" 4 Days later and yet another call from the same person. I asked her to remove my number from the database and she said she doesn't have the authority - which I'm sure is a violation of the law (POPIA) as I should be able to be removed if I request it. So... miway PLEASE delete my number and all my details from your database immediately!