Very disappointed

<p>Last week in 31st May, I had airtime and data on my tab. I set a limit on my tab. That morning I only sent out an email looked through 1 website and this was all under 20MB. I keep careful watch on my usage. Next thing I know is that I'm getting a warning message from MTN that my data is depleted. I checked my balances and my airtime and data was finished. I called MTN and asked for them to check what happened and their response was that I should call them later because their system was down. The very same thing happened in April as well and this time, my mobile data was off but my airtime was being used by an app and MTN couldn't answer my questions. I was told to speak to their technical department. This is now the 3rd time that this has happened and I am very tired of it.</p> <p> </p> <p>When I eventually called back in the afternoon the service consultant said that over 100MB was used between 1pm-2pm that day which was impossible because I didn't have any airtime or data and the mobile data switch was off. It seems that every time MTN is having a system problem my airtime and data is being used up and I'm not even the one using it. I don't keep apps running in the background and neither do I keep my mobile data switch on all the time. This is very disappointing and completely unacceptable. Every reason that I am given, I can account and answer for but when I question MTN they can't answer me. I must go to an MTN centre for technical assistance. </p> <p> </p> <p>I want answers to my questions and I want to know why this is happening when it shouldn't and it's only when MTN is doing system upgrades or its down that this happens. How many others are also experiencing this? </p>