Vodacom spams my number with their daily SMSes

Can you please, with immediate effect, stop sending me SMSes. It is becoming very annoying now. I have requested this on multiple occasions, but yet, I still get about 4 SMSes every single day from Vodacom. What is more frustrating, is that I cannot block that number and I cannot SMS back with the word stop, to opt out. The SMS states that you can turn off notification settings on the myvodacom app, all mine are turned off, so why do you keep sending me any form of SMS.