Account and use of data

On 7th of January I arrived back in South Africa from an three weeks overseas trip. We unpacked and slept for most of the day. According to MTN I used on that day, the 7th of January R3971.99 worth of data. My credit limit is R2500.00 and due to the data usage (according to MTN) my account for January was R1 606.47 (till 7/1/2016) and February R4 303.06 (7/1/2016 - 7/2/2016),<br> On 11 February an email was send to Customer Care to request the time of usage and how it was possible to use all that data in one day. I also enquire how my account can be over R4000.00 if my credit limit is R2500.00 (changed it in the meantime to R1000)<br> Up to now no answer were received and when I enquired on the 19th of February to when I can expect and answer to my email, I was informed as follows: \ Please be advised that they will contact you, as there is a que\"<br> No response up to date!<br> <br> At the same time I'm trying to change my package to a topup but neither the call centre not two branches of MTN were able to give me information. At one branch I had to complete forms and were informed that they will call me with an answer. Up to now - Zero feedback."