Elite Mobile doesn't understand what "not interested" means.

My vodacom contract is due for upgrade. I am not upgrading. For the last 5 days everyday an agent from Elite Mobile has called me, when I I tell them I'm not interested. I get "Yes ma'am we understand but..." I've put the phone down many times after expressing to them that they've called me continuously and I'm not interested. Can these id10t's please get the picture and actually leave me alone!

NOT INTERESTED