Frustrated that I received a bill from them (think...

Frustrated that I received a bill from them (thinking it was my bill from the ER - so I already paid twice for an ER visit) that had not been processed through insurance first. Because I paid the bill without knowing that, I overpaid by a significant amount of money and was told that it would take months to resolve. The claim was fully processed by insurance over two months ago and I have yet to see the money repaid to my account, even though I was told that it would take two months maximum (which is already a significant amount of time to be waiting). Their limited office hours have also made it difficult to get information, as I am typically working when their office is open (8-4). It was already frustrating enough to find out that they'd billed me without processing through insurance first but to have to jump through so many hoops just to get my money back is ridiculous and frustrating.

Update a week later: I called back today, during regular business hours, and was only given the option to leave a message. It is notable that the last time I called, I was able to speak to a representative. I am now incredibly concerned that I will not ever get the significant amount of money paid to me that is owed, as it is already well after the timeframe they said everything would be processed, and I am now not even able to reach a person to find out what is happening.

Update several weeks later: I never received a call back, despite being told multiple times I would. When I called today, I was told that there was a lack of communication from insurance with reprocessing: however, insurance had already processed the claim back in March, which I was told was all that needed to happen.

This company owes me hundreds of dollars because they never submitted my claim through insurance themselves and have now held up my money for four months.