Billed for free date

I have a problem from March 2015 when I was told I used more the mu 20 gig allocated data.<br> I spoke to Lorato call center manager and she promised that she or the technical department will return my call.<br> I the month of june I saw that cellc was trying to take a debit order and called again to find out why only to be told that I need to pay for the data I used above the 20gig, again I spoke to the technical department and they emailed me the report of data used for the month of march, and as per report I did not go over my data, a requested that Lerato call me back to resolve this outstanding issue, she was in meetings again as usual and requested somebody to call me that was struggling to short out my issue and was supposed to email me his findings, this was Tuesday still waiting. Still waiting for Lerato to call me and my suspension to be lifted.