INCORRECTLY CHARGED FOR DATA BUNDLE - NOT REQUESTD

In August 2015 i called in to mtn call centre to load a 1 gb data bundle, however an hour passed by and the data did not automatically load, i then called back to explain that the bundle did not load., the consultant explained to me that there was a problem with the network and i should wait. The next morning I receive 2 sms's indicating that I been loaded with 2 gb of data, I did not request for the second gig and mtn has still billed me for the data that I DIDN'T REQUEST or make use of, and i also did not use that second 1GB DATA as MTN somewhat depleted that bundle. So basically this is not my fault but the consultant who was so ***********. I was billed for that extra GIG. Personally, i would like to be compensated from MTN in some sort of way as I have been billed for something that I haven't used and which clearly not my fault. I am currently trying to contact mtn but they rudely cutting my call. Additionally, when I did get in to contact with last week MTN has told me I am in arrears with my account, clearly I AM NOT! Please sort this out.<br> I would appreciate assistance as my MONEY is involved and I am a dedicated customer but your customer service SUCKS!