Edcon ********** charges

My account was **********ly charged for cellphone products that I never used. I informed Edcon after I received a suspicious telephone call from one of their partner before the charges even began; this was in July 2018. When the charges started I called to have the charges stopped and Edcon did not stop them immediately. After that I have been struggled to have them reverse the charges and still given a run around. I keep getting collection calls, emails, smses when I have made it clear that my debt has been paid in full; they need to reverse the ********** charges. This was the 3rd time I have had ********** charges on my account, I now want to close the account but not able to as there is still a balance. To date (30 November 2018), still no indication when the charges will be reversed.