refusal with paid-up letter

Hi i had an account with RCS and i have paid -up the account, i have been asking for paid-up letter and no one is willing to assist me. My TransUnion still reflect that i am arrears with this account while it is paid-up.<br> <br> What ****es me off is that while i was still owing them they use to call me every day demanding their money and now there is no one available to help me with the paid up letter.<br>