Wat the hell

Today is the 14th i was to get my new minutes nothing. Its two pm no new minutes no sms. So i called n the consultant acted clever telling me its loaded coz she can see it on her side but her tongue suddenly got stuck when i asked how come the notification sms did not come through. This is not the first time. I think at times mtn even charge us for things they never gave. During the month i bought data which was not loaded even then i had to call so they can load it. Why such continuous bad ridiculous service. U never have to call me to get payment so y should i have to call to get whats due to me if u cant maintain pls advice i will gladly move to a service provider that can