ERC Debt Collection Complaint

ERC Debt collection department,

Other (i.e. phone, health club, etc.) Cont'd attempts collect debt not owed Debt is not mine Texas

I had a duplicated account created in error by - and this account got forwarded to ERC. I have been disputing this debt for over 2 years and they refuse to remove it from my credit report. I got ahold of - and they self credited the account for $100.00 and made me aware that they would inform ERC of their mistake. I have spoken to ERC and they only give me the run around stating they have let the credit reporting agencies have the updated information. Yet as of -/-/2017 they are still reporting this as a valid collection. I spoke to - and they say that ERC is the one that refuses to send them a release of obligation therefore they can not erase it. Between ERC and - they keep putting the blame on one another. Please investigate.