VVM debt collectors kept on calling me about a truworths account which I closed in 2023 but only for them to tell me that I have an unsettled debt and my account is in errors so I have to pay R850

VVM debt collectors kept on calling me about a truworths account which I closed in 2023 but only for them to tell me that I have an unsettled debt and my account is in errors so I have to pay R850. I then arranged for a debit order in July just so I can close the account and get a settlement letter but still they don't want to give me my paid up letter