Airtime Keeps disappearing

It is very annoying that my service provider that i've used for over 15years is the cause to my frustration. <br> A) May you please advise as to why you don't have an sms notification system that tells customers once they have used up all their data such as other service providers, instead of taking their airtime for data when it costs us the client so much more when you do that? <br> B)You have recently increased your data prices yet, people in townships such as myself struggle to get decent reception and are forced to use EDGE in this day and age in order to connect to the Internet. <br> C) Which is the one that disturbs me the most, why do you keep taking my airtime in both my contract and prepaid numbers. Yesterday I had R7.45 when I switched off my data on my contract number to my surprise today I only have R1.55. This happens with both my prepaid and contract numbers, worst part my prepaid number doesn't use data and I am not subscribed to any services so why keep taking my airtime? <br> Whatever happened to being the service provider that supplies transparency and fare billing to your clients? May someone please investigate and contact me due to this has been happening since Jan this Year.