Feed up with unwanted sms advertising

<p>In March I sign up on the MTN mobile network (big mistake!) and since then I receive up to 3 or 4 sms's per day from MTNYello. I have on at least 3 occasions sent STOP to opt out to the number provided, received the confirmation that I have been removed from MTN Marketing followed by more marketing sms's. I am completely fed up with MTN, as I did not sign up for this! I have to pay to use the services and then have to receive this garbage as well! I will NEVER recommend MTN to anyone! </p>