Poor Service/ Unable to remove accounts on my credit report

I had two loan accounts with capitec and due to missed payments, my accounts were sold to DMC. After the accounts were sold to DMC, DMC created their own accounts on my credit record with their own reference numbers, and the capitec accounts also remained on my credit records/reports. Last year March i managed to settle the sold accounts with DMC, and they managed to remove the accounts they created on my credit record/reports using their own reference on my credit profile. Now since March last year i'm not getting any help from capitec to remove their accounts on my credit report, i called the credit bureaus and they telling me to advise capitec to request for updates because the reference number on the paid up letter i received from DMC is different from the one they have. I went to capitec again today and they referred me back to DMC, i then called DMC and they told me they removed their accounts of which it is correct they removed their accounts. Please hellopeter help me so that the capitec accounts can also be removed on my credit report, i think they are failing to take responsibility. Please capitec remove your accounts on my credit reports, its almost a year now not getting help from anyone at your offices.