Still constantly getting Spammed by Cell C

I have sent emails and messages to Cell C asking to please remove my number as well as my wife's number from ALL smses services. However I am still getting smses from Cell C.

I was told it had been done, but again today I get new SMS from Cell C: "PLAY GAMES NOW! Dial *147*6*152# Cell C"

This is ridiculous now. I want to be COMPLETELY removed from ALL Cell C smses. Not just marketing!!

I will never recommend Cell C to anyone. They are pathetic and spam you all the time.