LISTED AS ACCOUNT IN ARREARS BUT I NEVER MISSED A PAYMENT

GOOD DAY I HAVE A PERSONAL LOAN WITH NEDBANK WHICH MY DEBIT ORDER AGREEMENT IS THE LAST DAY OF THE MONTH, I HAVE NEVER SKIPPED OR MISSED A PAYMENT, LOGGING ONTO MY CREDIT PROFILE LAST MONTH I SAW THAT I WAS 30 DAYS IN ARREARS THIS HAS HOWEVER AFFECTED MY CREDIT RECORD AND SCORE, THIS IS UNACCEPTABLE, I EVEN CALLED LOANS DEPARTMENT AND HOWEVER THIS HAVE NOT BEEN FIXED, YOU GUYS ARE MESSING UP MY CREDIT PROFILE AS IF I DONT PAY YOU GUYS, THIS IS NOT ACCEPTABLE, I NEED MY NAME CLEAN OR I WILL TAKE LEGAL ACTION