Terrible customer service

I have been a customer of MTN for more than 15 years. I have a mobile data contract from MTN and I monitor my usage carefully using the *141*1# service so that I do not consume data over by allocated bundle. On the 24 September I receive and an invoice indicating data consumption of over R2000 for data usage. Knowing full well that I was closely monitoring my consumption and did not exceed by data bundle, I called the call center on 25 September to lodge a complaint. I spoke to Lunga and was given the request number ***. <br> As I did not receive feedback I called the call center again on the 13th of October 2015 to follow up. I was told a person by the name of Riyaad Davids was dealing with the matter and was given the reference number of 135 258 222 and request number ***. I have not heard anything since about my refund and I am extremely annoyed by the poor customer service. <br> Two of my MTN contacts will be expiring shortly and if the matter is not resolved promptly, I shall be changing service providers and taking the matter up legally. <br>