Cell C billing system is wrong, and no response

Cell C's billing system is wrong, and they are not coming back to me with answers.<br> Started querying on 16th June. No response. Follow up calls 10 days later. <br> Got a response after complaining on Hello Peter, but after a few phone calls Moses has gone quiet and not come back with further answer.<br> <br> The problem - Cell C say they use data from whichever bundle one has that will expire first. Makes sense. Except they don't do this. I mailed them a very clear example using three months on my statement that shows how they used data from a later bundle first meaning that an earlier bundle expired and I lost the data. <br> <br> Separate issue that they hit me with a 360MB session which is completely impossible given my data usage going back over the last 6 months statements. I don't think their data speed is quick enough to download that amount in an hour.<br> <br> frustrated with these issues, but more frustrated at amount of time I am spending getting no answer