Account showing arrears when its up.to date

End of.last year I took out 2 additional.contracts and the person created a seperate account for these 2 contracts instead of adding them to my existing account. I have been trying since last year to get the accounts department to put everything onto one account without sucess. Yesterday I was advised that my account is in arrears by R200 odd, which it is not. This reflects poorly on my credit record and is bringing my credit rating down. I demand that this problem be sorted out once and for all and that you remove all bad credit ratings from the system by end april. I am very irritated with this entire ordeal and the lack of intelligence in the accounts department in being able to.sort this matter out.