Harassment from Discovery Vitality sales agents

I am already regretting signing up for Discovery medical aid. My goodness ever since I signed up their consultants have been harassing me on both the main number I provided and the alternative number that they claimed they wanted for emergencies - All this to flipping sell me Vitality! I keep telling them I am not interested and even asked them to put a note on the system but still, the harassment continues! Think twice before taking out discovery medical aid!