SPAM calls from VODACOM

I am totally and utterly disgusted with Vodacom. I have received 24 unsolicited phone calls from Vodacom over the last 23 days to offer me specials and ask me to upgrade my contract. They started contacting me Nov 2021 asking me if I want to upgrade prematurely. They phone from different numbers trying to get through to you if you block a specific number. If you tell them that you are not interested they just continue with their script with total disregard of what you said. Requests to have your name removed from their spam call list are totally disregarded. They have a total disregard for my privacy or my needs as a client in this regard.