Product: Debt collection

I went to the ER for medical attention on XX/XX/XXXX. I started receiving multiple medical bills for the services provided. I had medical coverage with XXXX. The benefit statements from XXXX  for the claims submitted were to be paid by XXXX. During the claim process, one specific provider in the amount of {$2300.00} forward my medical bill to a collection agency, Transworld Systems Inc. They sent me a collection notices and I disputed it, notifying TransWorld that XXXX  had paid the provider per XXXX  's billing statements. Thinking this matter was resolved and paid, I did not further investigate. I am going through the process of obtaining a business loan. This collection appeared on my credit report. I disputed it with the credit agencies XX/XX/XXXX. I contacted XXXX. I learnt there was an oversight on their end as far as paying the provider. They resubmitted the claim for process and conference in a call with TransWorld to explain what had happened. TransWorld assured they would contact the provider and confirm with them that the payment was made.I called TransWorld to follow upXX/XX/XXXX. I had to explain the situation and they told me not worry it was under review. I told them this was an urgent matter and I requested to speak to a Supervisor. XXXX XXXX XXXX came to the phone. I again explained my concern and told XXXX I had in my hand a letter that XXXX emailed me explaining the circumstances of their mistake and the provider had been paid. XXXX XXXX, said, he could not help me and he did not have control over the service provider response back to TSI. We would just have to wait. I requested a letter of deletion from TSI in order to provide it to my loan officer. He refused, and said TSI does not provide letters of deletion. After an hour of discussing this with him, I felt I was just being giving the run around. XXXX XXXX XXXX would say, we review each situation on a case-by-case, and then he'd say, they would just listed as paid in my credit report but not delete it. I didn't understand how he could take this stands when it is clearly a mistake and even enough I had documentation payment had been made to the provider. I asked him several times, how can you report this on my credit report if it is in accurate. He kept on referring me back to the provider and saying they ( TransWorld Systems Inc ) are only a 3rd party collection agency. I said, I understood, but TransWorld Systems Inc was the agency reporting the collection and no one else but them can report it. He would not agree with me on that. I this point, I knew XXXX XXXX XXXXs not in the business of helping people and I wasn't going to get help from him in resolving this matter. I went ahead and fax over the information anyway,XX/XX/XXXX/ XXXX XXXX  CST. Even though he said there was nothing he would be able to do. I called back and asked for XXXX XXXX after I faxed over the documents. He refused to take my call. I was told it would take 24-48 hours to get the faxed documents uploaded into their system. I've never heard of a fax taking that long. It is clear to me, they are unwilling to corporate with me. I tried resolving this in good faith with them to no avail.