Cell C Overcharging & not responding

I recently discovered that my R 99 per month data bundle with Cell C was suddenly costing R 279 per month, and Cell C was charging me, in some instances, over R 400 for 13 seconds of internet, and over R 200 for 5 seconds of internet (with many more examples). <br> <br> On 24 August 2015 I made contact with their Customer Service Department and asked for copies of all my statements. I received my invoices &amp