Vodacom harassing customers

After months of literally being harassed by Vodacom agents calling, emailing me to upgrade my contract. First they dont listen to you when yoy say no or cut the call they keep at it until its so frustrating you answer. I was pressured into accepting an upgrade which I was told I could just reply "no" to the sms they will send and it will not be processed. I did that and the next day couriers are calling me to deliver a phone I never agreed to taking. There after the harassing calls continued until one lovely lady actually helped me and offered a contract for data and mins only. I was happy. Not even a week later, vodacom starts to harass me again, calls emails for upgrades. How *********** are they? Do they not work off the same systems? Can they not see I've changed to data and mins only. No, cause they are bullies that push their own agenda on you, I've been a vodacom customer for over 20 years now prepaid and contracts and this is what I get in return. I have no words for your complete disregard and respect for your customers. If I receive one more call, I will be moving to MTN.