Letter to proof i settled the account.

I can't express the anger I have right now, I paid up every cent I owe Justine but I still reflect as a bad payer.<br> I request a letter which state that I have settled my account and I have been calling your call centre and since last year no one wants to give me a proof that I have paid you.<br> I just called now I spoke to Oscar Khoza and I was told he will call me but nothing happened and when I tried calling again I was put on hold and line dropped and no one called me back to acknowledge it.<br> I have never seen such a horrible service.<br>