Unauthorised change in credit limit

<p>On the 22 April 2016, my phone was blocked by MTN. I called 808 to understand why my line has been blocked, I was informed that this is due to the fact that I had reached my credit limit for the month. I told the consultant that this was not possible as i was on TOP UP and my credit limit was zero. The consultant I spoke to on the day was Puleng. I asked her who had authorised this increase as I had been on TOP UP all this time. I asked her to increase the limit on this day as i needed to use my phone at that time. I called back on that day ( 22 April) to understand when my contract changed and who I could call to query this billing as I feel I am not responsible for this. I also asked them to change my limit back to zero. On calling the second time I spoke to Laurence. He was also not able to help me. I have called MTNseveral times querying this unauthorised change in my credit limit , 11 May 2016 and the 20 May 2016. I have requested a transcript of the call that I apparently made to authorise this change and no one has been able to help. I have sent emails to custoomer care *** and no one has helped me. I feel that its unfair that I have to foot a R 2199.13 bill when I didnt authorise the change and I have been on top uo for the last 24 months.</p> <p> </p> <p>My bank account has been debited with this amount already, MTN has been unhelpful. the call center service is shocking and there is no direct billing department I can speak to. This has been so frustrating. In all the years i have been a MTN customer, I am contemplating leaving this service provider.</p>