Blacklisting

I was shocked to see I was blacklisted by AVON Account no: ***. I have paid up my AVON account and strange enough for someone who can get no credit anywhere else because of the blacklisting, AVON approved another account (Acc No: ***) with them a month later???Is that even within terms of NCA. Please can you update my account details at all Credit bureau's as Account no: *** being paid up or have it removed. also Please forward me a paid up letter for account number: ***.