QUERY ON DATA SINCE JULY NOT ANSWERED

I paid over R1000 in my July bill for 1,4GB of data used. Since this is way more than I usually use, I looked into my detailed billing. On 28th June 2015, between 18:28 and 19:38, i used 4 times exactly 270.502MB. Almost as if the charge was inadvertently repeated 4 times. I have queried this via the MTN Active webpage twice and 3 times in direct emails to Customer Care. Only one reply was that they could not see my previous query, notwithstanding that I quoted my Reference Number (Reference Number: ***7). Why have a reference number then?<br> When can we get some decent service from our Cell Phone providers?