Inflated amount for service not provided

On Saturday the 26th of July, MTN debited my account R1 689.00 for the one gig that I received monthly. I am supposed to be paying R79 for this contract but since its open contract I pay more after reaching limit. Lately I have not used the phone for calls, it has been mainly facebook, whatapp and instagram which is also something that I do not do all the time.<br> When enquiring about this inflated bill, I was told that it's because I reached my data limit, I have never been out of balance over this period, never even got to a point where my data bundles were less than 500 MB.<br> <br> So where exactly does this R1300 included on my bill coming from? <br> <br> Worse of all, I have spent close to 120 minutes on the call trying to get hold of CC agents, first person made jokes that I found irritating and complained that she could not here me because of the noise in her office,<br> The second lady, soon after greeting dropped my call..<br> Why am I being billed for this itemized bill given that this is an issue being reported and call Centre agents are unable to provide clear response behind the inflated bill.<br> <br> Lastly my bill has never went past R400 during high usage time, what changed MTN????