STOP sending me SPAM

I have never given consent for marketing material nor to be contacted by Vodacom Plus I'm registered with Opt Out but I get hourly SMSs and phone calls about specials or requests to purchase data. It also doesn't help I block the number because a few days later it just starts again from another one of the million SPAM bots you have

Just leave me alone, I will purchase data and airtime when I want, I'm not interested in any vouchers or specials or anything.