CBCS Fake Credit Agency Collecting on Behalf of Gas South Columbus Ohio

This is the second time i have received an invoice from CBCS. The first time it was addressed to my husband for an unpaid Gas South bill, which surprised us. We checked out bank records and called Gas South and we did not have an outstanding balance due. We threw away the "invoice" after we read several reviews stating that it was a scam. 

Today, we received a second invoice agin addressed to my husband by with DBA at the end of his name. Again, we checked out statements and we have not been mistakenly late on any bills. The account numbers also don't match up.