Accounts to be updated on credit profile

This guys are not professional, they provide me with incorrect information. They always says they will call you back or you receive email before close of a business. But they don’t do that, in fact they want to cut your call. I have settled all their accounts but one updated on the credit profile and they other one is not, telling me to wait another 7 to 14 working days .. I asked them to send me the email with instructions which was sent to trans union stating that both accounts should be updated. No 1 is taking this serious as they are ignoring my request. Why they have created 2 same accounts while they knew they will update only one account. Which company deals with complaints like this so that I can report this matter with DMC. I am tired to be putted on hold always when I call DMC.