I hate Mtn with a passion

I have had enough with Mtn and it *********** call centre staff! I have had this problem for months now and have called the call centre numerous time and still not getting any satisfaction, my airtime keeps disappearing, I have checked for any subs and there's non everytime I stream or use the internet in any way instead of taking the data it takes the airtime and leaves the data. I have recently figured that one out on my own but when called the call centre An agent by the name of Matapelo that her supervisor by the name of frank would give me a call back, it been over a month now and the problem still persist and I have received no help from Mtn as my service provider, every single day I'm loosing airtime bit by bit, The network sucks! When people call me it gives an error that my no does not exist and it constantly goes to voice mail whilst on. Kindly refer to your system and check the number of times i had to call in for the same problem and it not sorted.