pathetic service

I had an account with lewis stores, around June this year I requested settlement balance which was provided to me and I paid up. I then requested a paid up letter and was advised they d not supply with same. after few days I decided to call them for clarity and was advised tht the settlement balance provided to me was incorrect, there was an outstanding amount on a R100 with a couple of cents which I was advised that I need not pay it they will refer account to billings and they will settle it on my behalf and the account will be closed, they were not calling me and I made ff to confirm if the account was closed and I discovered not instead the balance had accumulated interests and charges and I decided to settle it in full and the account was closed. recently when I was applying for car finance was advised tht my name is in arrears with the LEWIS account, I mean really, really -now??? and despite all they have a decency of sending me Sms's with their sales like I care. I want them to remove those arrears fRom my ACCOUNT ASAP