MTN’s employees lack of knowledge both in the shops (SANDTON) and call centre and wrong adverti*****t in the leaflet and on the internet

I have been loyal customer to MTN, but their service is getting worst every day. Recently on the news I heard that MTN had the highest Data price and it was requested that they had to drop the price. However instead to drop the price now even they make the worst for the customer and the shorter the time for night express data from 12 am till 6 am to 12 am to 5 am without informing customers. Even on internet new deals are advertised with night express data is from 12 am to 6 am. After checking their employees both in the shop in SANTON and call centre I was told that that the night express data is up to 6 am. However, after telling them that twice in a raw my night express data was stopped at 5 am one employee after checking told me that recently has been changed but they haven’t yet communicated with customers. I requested twice in two days to speak with supervisor but apparently were not available both time and I was told by MTN champions that someone would contact me during a day - but unfortunately no one contact me