No response to 3 emails for incorrect billing

On the 14-Mar-15 , I received an email stating that they detected an error on my itemised bill and which they rectified. This error was for the fact that they displayed my number instead of the number that I called on my itemised bill. I rep**** saying that this was not the only error as the billed amount of R1922.05 for internet usage on the 23-Feb-15 is incorrect. This cannot be possible. It showed that I used 2,494,453,112 units of data.<br> I sent 3 emails regarding this subject .On the 15-3-15