Stop means Stop MTN

How many times must I SMS Stop/Opt-out before you actually do it. My aunt is a pensioner. Please stop *****ing her airtime to market to her, especially since we have been trying to get rid of your marketing messages since January. Don't say "You have been successfully removed from MTN's marketing list" and then send the exact same message two days later. She is never going to need data - she doesn't even what that is - or any other stupid deals. When we say Stop, that is actually exactly what we mean. Stop!