RUSSELLS BLAMES CUSTOMER FOR STAFF MEMBER INCOMPETENCY

Well I bought something from Russells store in lephalale "Marula Mile" to be exact. Had an installment of R439p/m. Last year(2021) August, I went to the store for a settlement on the account. I was given a settlement of R3002, of which I paid on the spot. Two months later I get a call from their headoffice saying my account is in arrears and need to make a payment of R532 since I've missed an entire months installment. Now I was overwhelmed cause to my knowledge the account had been settled and closed. Nevertheless I was told that it was one of their staff members incompetency that led me to be in R532 worth of arrears. I then again on paid the R532 and verified of the account is debt free, which I was shown on the desktop screen that indeed my account is on R0.00 and is closed.

Fast forward January 2022 I get a call again from Russells headoffice that my account is still owing R439. I informed them that it has to be a mistake and I explained everything that has happened since August 2021. Now Russells headoffice is telling me that I owe them +/- R600, and that they are not accountable for the staff members incompetency for giving me the incorrect settlement twice, they are now talking about handing over my account to the lawyer/attorneys. Can anyone please advise on how to tackle this matter.