Excessive Billing

Starting to not appreciate the service received of lately. First/2nd week of November 2015 I called in to Mtn to report that my data had been depleted as well as airtime was depleting after checking that i was topped up I would monitor and check my balances and then realizing that data was depleted without even using any. The agent I spoke to confirmed that there was a technical error on their side and that he can see on the system that my data was been charged to my airtime and was charging me on out of bundle rates.<br> So this was feeding off my airtime as well. I asked to be rectified as I did not want a bill for which i am not responsible. He said he would log my query and have the technical personnel investigate further. 2nd week arrived after concern i called in again. Explained myself and was told there was no recorded call of my last phone in. Thought all calls are recorded for \quality and security"purposes"