Dissatisfaction with coricraft store

Greetings I had a coricraft account but last year I paid off my account and called the call center to close it as the cashier told me that I couldn't close it in store I called the call center and was told it was closed. Fast forward to this year I recently received a letter from the lawyers stating that I owe them R 198 rand as the account isn't closed and that they will take further action against me,my complaint is that I have already settled the account in September 2018 as far as I know the account is closed they have never sent me an email with a statement to inform me that the account was still open and has been accumulating costs,this is completely unprofessional and I now clearly see that the call center agent was also not doing her job I now fail to understand why I must now pay for a mistake or lack of professionalism from their company. I would have never paid the full balance off if I didn't want to close the account,this is really bad service and the level of service is truly one that I would never never recommend to anyone . Please help as I'm now frustrated and have reached a level of dissatisfaction with them

Unhappy customer G Mabaso