Edgars Unauthorised Mobile Content

on 21/08/2017 I received an email from Edgars Collections department, Ref C27, advising that I owe them R109,68 and failure to pay will result in me being blacklisted. To the best of my knowledge my account with Edgars was fully paid and have not received any monthly statements from Edgars either. Upon querying with them on 24/08/2017, ref no ********** 213450 I was told that it was for Mobile Content. I did not purchase nor request any mobile content from Edgars or any of their partners and requested that it be reversed and was told that the Billing Department will contact me with 24-48 hours. I received NO response from Edgars. On 30/08/2017 I again contacted Edgars, ref no. ********** 224378, and was again told that they will call me with 24-48 hours but still NO response. I requested proof of such purchase/ request for mobile content but received nothing. It appears that the mobile number to which the mobile content was sent does not even belong to me, so I would like to know how Edgars associated that other mobile number with my account? This in my opinion is ***** and theft by Edgars and who knows how many other people they are de*****ing like this, and then threatening to blacklist. I want to close my account with these ********** but cannot do so because of the outstanding balance. I will NOT pay this and Edgars needs to reverse it and give me an explanation as to how it was debited against my account.