Blacklisted for Mobile Content Fee I did not agree to and should be cancelled

I have been a loyal client of Edgars for about 15 years now. I have always paid my account diligently and because I know I have an account with Edgars, I would go and pay on time every month after receiving my salary. September 2018 I settled my account and paid the balance in full. From there I did not go back to Edgars as I knew my account has been settled. I then received a SMS in January 2019 that my account is due and I need to go pay. I went to the store who advised me that there is a Mobile Content Fee on my account each month of R24.99, something I never opt in for or agreed to. The store assisted me by calling the call centre and explaining that the Mobile Content fee needs to be cancelled and refunded to my account. I was advised that this will take 15 work days. A few days later I then received another SMS stating I need to settle my account and I went back to the store. The store again phoned the call centre who explained that a note has been made on my account and that I can ignore the sms's while they are sorting out the matter and that we are still within the 15 work days. Today (19 February 2019) I received an email from Edgars Collections that I have been BLACKLISTED for non payment. This is unacceptable! First you ***** my money and now you blacklist me for it! I insist that a manager get in contact with me to clear my record ASAP. I have NEVER default on any payments and I have always had a good credit record, now thanks to Edgars I have a mark on my name while you were supposed to sort this out. I do not care if these are actions by another company, I deal with Edgars and have never agreed to any of this, so Edgars must now sort this situation out.