airtime billed without my concern.

in 2013 i settled my edgars account as i resigned from work,in 2014 i recieved sms to make payment or i'll be blacklisted.i went into N1 city branch and the manager called call centre on my behalf.i was told that airtime is been loaded and was billed into my account for the 3months. i disputed that as i've never requested for an airtime from edgars.i was told that my account will be credited/cleared but now i found out i needed to still pay for the arears of non-payment of those airtime.i called and spoke to Nokuthula on the 13/09/2014 at 13:18 ref nr of call (337683) she told me that they cant do anything but OTA must fix it. (apperantly OTA is company providing this airtime),then she said im a customer stuck inbetween edgars and OTA.i believed edgars should've escallated my query to their OTA not me running up and down fixing my name from been blacklisted or bad credit record.i again called and spoken to Denzil hughes in october 2014 and he promised that i'll be contacted and query will be resolve,untill today no one ever bothered to call me back. as a black young women who clueless what to do next i please need you to help me with this query.i need help to clean up my name.thx