Terrible service from MTN

I signed up for an upgrade late 2020. I was assisted by Ayanda from the retention department. Due to the inconvenience caused I was promised an extra 1gig of anytime data a month. To date I have not received the 1 gig data. I did log a query. Never resolved. I also emailed Ayanda a few times. No response. I am just a small customer for MTN. MTN do not care. NOT HAPPY. My number is ***