Data Chargers

I was recently charged nearly R2400 cell phone bill which i paid via payment arrangement, and was advised that its because of data chargers. i was now charged again nearly R3300 bill and again advised due to data. i have called in to request detailed information regarding this past Saturday and have received no feedback. Ive been using a smart phone for a long time and not new it i find it very hard to believe that these chargers are true. i have tried getting hold of my account manager again to assist me in this regard. I also had a limit on my account of R800 which you people have decided to have deleted against my will, apparently its your process. Its sad, that as a loyal client of MTN, i receive no solutions as to how to curb my bills to accommodate my budget, and its for this reason i will be going to cell c because of the lack of interest and solutions from my current SP. And sadly with data its something you see, not like a phone call and these chargers magically appear. it simply feels like ****************. i have recently taken out a telkom data package to assist me with my data usage, as MTN call centre is just pathetic!!!