Stop harassing me on my private residential number !!

MTN won't stop harassing me on my private residential telephone number !! STOP IT STOP IT - I did not give you consent to call me all hours of the day and night for your marketing calls !!!!!!!!!!!!! I don't deal with consultants over the phone and I am not interested in your marketing calls ! If I need an upgrade I will go to a store where I can speak to someone in person, not a voice over the phone !! STOP IT IMMEDIATELY