No data notification messages

<p>I have been trying to get hold of someone who can tell me why i didn't receive notifications that i was about to run out of data. I ran out of data unknowingly now and thought that this was standard practice to let me know prior to this. I myself had to login online to see that i had inucrred some data usage costs and that my bundle had run out!</p> <p> </p> <p>I have dialled 082111 to which i was told i'm on some new system and need to be transferred to a different consultant as they didn't have an option to view my profile. Waited 60 minutes only for the call to be dropped. Phoned again and was told i need to call from the cellphone in question because you are having issues transferring calls. Not sure how true this is. Anyway i obiliged and I'm currently on hold waiting for a long time again..............</p> <p> </p> <p>Can someone please tell me why i never received any notifications????</p> <p> </p>