Poor procurement service

Good day I'm NI Razwinani with an account no *** with My ID No 860510.......084. This account was paid in full and closed sometime last year. This year around June when I was busy optaining the close up letter for my accounts and I just find out that the account is still reflecting - R690 plus, when I contact avon they say my account is under debt review and they can't communicate with me, when I try to make follow up mails regarding which group am I under debt review with they never respond till to date. The worst thing about this issue is that this account is paid in full and closed but Avon didn't clear my account to credit beroer from their side. Now I can't even afford a contract phone and all I wanted was for them to clear my name as their account has been paid in full. I'm so disappointed in this system of theirs and I need them to resolve this ASAP like yesterday as this has already ruined my credit profile.