Refuses to pay for test done while in hospital

Child was born and had standard tests done one of which is hearing test. FH refuses to pay for the test even though it was a test done in hospital. FH says payment must be made from savings, which are depleted. FH also says I had to call and get authorization. Really? I had pre-authorization but yet I have to call for authorization for a in hospital hearing test. A test IMO that is as important as any other test being performed. Or does FH not care if our children are BORN DEAF or has a hearing problem that could rectified if detected during the early stages and be address immediately. FH states all in hospital procedures are covered by insured benefits, but this is obviously false. Firstly told its NOT covered then told I had to get authorization if its done in hospital. Next step, Ombudsman!