Billing query: MTNSP

I have been using Mtn since 2007 and from August 2015, my 3G usage for ***<br> escalated from <br> <br> Aug-15 R 2 444.16 Account queried with MTN Hemmingways East London <br> Sep-15 R 5 913.43 Account queried with MTN, for 2 weeks I was out of the country and not using the 3G <br> Oct-15 R 2 798.82 Account queried with MTN <br> Nov-15 R 385.00 <br> Dec-15 R 385 <br> Three of the Reference numbers is *** and *** and ***<br> I am not giving in to these bills and hoping MTN will resolve this. Why are so many people complaining against the billing of these months if there is no problem. <br> <br>