worst service ever

I have an issue with my account, my account has been handed over to debt collector for an amount outstanding that was paid in full in July 2019, I even received a letter in August 2019 from Edgars stating i have paid in full and no amount is outstanding.

So far I have spent over R400 in airtime trying to resolve this matter with Edgars with no luck i have been at customer care, new accounts and accounts department and seems all are passing the buck to the next, 09/01/2020 i have spoken to all these departments and they have log calls and was told I will get feed back on 13/01/2020 and currently i am still waiting to get feedback.

13/01/2020 I have spend again almost R200 on airtime to get that feedback also with no luck.

I have also tried getting a hold of someone at there head office to assist, also with no luck they only took my details and told me someone will phone me back and still waiting on that call.