Exorbitant sudden increase in monthly account

<p>I started a contract with Vodacom in june 2015 and was paying a certain amount every month with no major changes in that amount. From May 2016, with very little change to the usage on my cell-apart from a bit of live streaming, my account JUMPED up to R2500 +-! I immediately stopped live streamimng and the next month it was over R5000!!!!! I went and spoke to them at Liberty Mall, and the only thing they could tell me was that ALL my Apps on the iPhone were on, and that was why the usage of data had gone up, and then advised me how to only keep open those that I was actually using at the time. This I did, and the next month it was down to R2000 odd then last month back down to what it had been for the past year. Now this month, with hardly using my phone except for the odd time on Face Book, and deleting 2 games I had on the cell,my account is now nearly R6000!!!!!! I went straight back to them and asked for a detailed printout of my account, and the only thing of extreme amount was "Data Usage"...NO explanation!!! Today I was speaking to a friend, and her and her husband have had EXACTLY the same thing happen to them fron May, except their account went up to R18,000!!!!! and she's heard of at least 2 other people with the same complaint. PLEASE can someone look into this for us as it seems something is DRASTICALLY WRONG at Vodacom!!!!</p>