Unhappy MTN customer

I phoned MTN about a week ago coz of my missing airtime. I was helped by a very rude agent by the name of Thato. I tried to explain to her that twitter is free on mtn and it shouldn't be taking from my airtime coz i don't watch videos. She told me about backround application which i didn't have coz i closed all my applications and log out everything and everything that i don't use is restricted, she refused to hear me out and i hung up. I phoned again was helped by Kgothatso and logged a service request for me and was told they will attend to me in 3 days. It's been almost two weeks and nobody has contacted. As soon as i find time i am going to port to another network. This was my 1st time calling to the call centre after more than 10 years of being with MTN but i was very unhappy about the service