Mtn leaking personal information

I have been having endless troubles once I changed from contract to prepaid I have 2.4gigs data however everytime I load airtime it's been used on data even after me using the application to cancel the airtime been used for data I go onto my mtn app and I can see i have airtime however when I try to call I cannot make a call a consultant told me yesterday that there is a problem as they have to keep refreshing the line I called in this morning only to speak to a very rude consultant if you listen to the call all she does it aggravate the caller How do you have ppl like this working in a call centre I would appreciate someone please looking into this if not I will have to migrate to another network as this is just not working for me ..mtn has just been getting this wrong ..there is a case opened where ***** is investigating where someone at a store gave out my personal details to someone they befriended including my address and I'd no and now this type of service ...