Business ProfileforOB Hospitalist Group

I called the OB Hospitalist Group billing agent @ 1-888*********. I spoke with a woman who refused to take payment because the balance had been forwarded to collections in April. I explained that I was a single mother buried in bills wrapped up in a child support heart and finally had money to pay. She refused to let me discuss the issue with a manager and gave me the number of the collections agency. 1-866-********. Called collections recovery system and spoke with Joann who I made a payment in full of $312.50. I requested an email itemized receipt so I could submit to the father for reimbursement per our court order (or just a simple receipt of payment). She stated she could NOT provide that but would enter a request to have a receipt mailed. Yesterday I received an itemized receipt from the hospitalist group illustrating an insurance adjustment of $186.04. It showed $0 for patient payments and $0?! Confused I called the hospitalist group again to find out if I over paid and why the “bill” looks like I never paid or owed anything. He said because it was in collections since April and not their responsibility I must speak to collections. I said I just need proof I owed money and paid in full. He refused to provide me with that information, refused to transfer me to a manager or anyone that could help me further, refused to give me his name and then hung up the phone on me. I can not comprehend why they are making it impossible to now show and provide proof that I owed/paid them money. I understand that the payment took time to provide but that is not a reason to refuse to provide me Pertinent information nor do I understand why the information they sent implies I owe nothing, never owed anything and no payments were received. Or their refusal to remedy the situation or issue a refund if insurance did make adjustments and fully pay later.