MTN USELESS CUSTOMER SERVICE!!!!!

MTN - PLEASE STOP SENDING ME MARKETING EMAILS EVERY SINGLE DAY!!! IF I WANT TO ENTER A COMPETITION, I WILL. IF I WANT TO BUY AIRTIME, I WILL. YOU DO NOT NEED TO REMIND EVERYDAY!!! I HAVE DOWNLOADED THE MYMTN APP AND DESELECTED THE OPTIONS TO RECEIVE MARKETING EMAILS, AND WHEN I GO OUT OF THE APP AND IN AGAIN, MY OPTIONS HAVE NOT BEEN SAVED! I'M SICK AND TIRED OF OPTING OUT OF YOUR SILLY EMAILS, ONLY TO RECEIVE THE SAME SMS THE NEXT DAY!!!!!!!!!!!!!!!!!!!!!!!!!