The worst service provider

It is been many attempts now that I have been calling Cell C call center for assistance with changing numbers but they keep on giving me excuses, the promises me that someone will call me to confirm with me even now I am still waiting, the reason why I want to change the number is I want to go back to MTN normal prepaid contract as Cell C has been disappointing, Yes the data rates are cheap but they don't last reason why I don't know and with MTN thou they are a bit more they used to last longer, I am fed up with Cell C and would not recommend anyone I care about their service.