harrasing me to upgrade my vodacom usage

For 3 days Vodacom is constantly phoning me from ********** 496 to upgrade to a better package to save on my data usage. I assure them I am happy to top up when I need more data, 20min ago the male phoning me to offer the same package which I declined a few times - said he will make sure I even pay more for my current service just because I don't want to give him a chance to give his full pitch on how to save, so rude,

I asked him to take my number of the current marketing phonelist, he was so arrogant.

please Vodacom - no means no... I don't need more marketers to phone me,