Frustrated Ex-Card holder

On the 9th of August 2021 I sent an email to the Edgars customer centre for a settlement amount or should I say for account closure. On the 10th I made a payment and was told it will be allocated into my account within 48hrs and account will be closed. The following week I got my statement and it showed R0.00 balance on it. Yesterday I got another statement from them and now I owe them R85.82. When enquiring about it I'm told it's an Edgards Club fee as well as as an Admin fee of R33.00. What frustrates me now is two things, when I enquired about an account settlement/closure nobody cared to inform me about the Club account that I needed to close as well and secondly today when I call their customer service number the first agent couldn't hear me but she gave the above reason for my outstanding balance. She kept telling me that I need to move around because she can't hear me properly, funny enough I was calling her from a landline. I tried again with a different landline, the second agent kept saying she can't hear me I sound like a robot. I tried for the last time with my cellphone, they picked up the line but kept quiet. Tomorrow when I don't pay this account they will list me on credit bureau as non compliant client. When I wanted the account to be closed was because I don't want any debts to my name. I sent them an e-mail yesterday and to date nobody responded to me. Please advise or tell me what should one do in a case like this because I'm really frustrated now.....