PAID UP LETTER

I have settled my accounts in January 2015, my account was in arrears, a called lawyers to ask for settlement amount. Thay told my my account Is not woth them is with store. I called foschini customer services that gave me an amount and a referance to and the account to pay to. I called to ask for a paid up letter, they said they can't see my payment. My payment only showed in February on their side. I called again but I was sent from pillar to post. No one really new where is my account. Customer servicre said I must call lawyers I did that, they said my account is with the store(foschini) not with them. I called foschini customer service to let them know but still they said they don't know where is my account but they can see the payment I made. From january until today I'm struggling to get my paid up letter instead I'm being asked to pay the account. Ths is a very bad service I got from foschini. Is this how they treat us..mi regret the day I accepted the pre approval account from them