I suspect ***** on my billing!

I was charged R 1 223.76 for data usage of ***bytes:<br> <br> Total usage for 01/04/2015: 198 216 704<br> Total Charge : R96,98<br> <br> Total usage for 02/04/2015: 809 585 664<br> Total Charge : R273.00<br> <br> Total usage for 03/04/2015: ***<br> Total Charge : R853.78<br> <br> I submitted queries on the following dates regarding my queries on my billing:<br> <br> <br> 2015-04-15 Reference number : ***<br> 2015-04-16 Reference number : ***<br> 2015-04-16 Reference number : ***<br> <br> I have not received any feedback as yet. <br> <br> I would like a full explanation of the following:<br> how I was charged R853.78 for 1.3GB whilst I had a positive balance of 5GB as I had purchased data the previous night?<br> How come I am charged R273.00 for 809.585 664 MB and R853 for 1.3 GB?<br> <br> My out of bundle rate is supposed to be R0.29 per MB <br>