I had a secondary insurance that wasn t originally...

I had a secondary insurance that wasn t originally added to my claims. I didn t realize until after I had paid some out of pocket expenses not covered by my primary insurance. I called to have this sorted out and a couple weeks later spoke to the billing team and was told that all claims had been sent and that I did not owe any additional money. 1.5 years later they start billing me again out of the blue. I sent a letter explaining the situations and my insurance information and the billing team told me the insurance had been applied and that I still owed money. Then a few weeks later they sent the bill to a debt collector. Meanwhile, I checked with my insurance companies and my secondary had only ever received half of the bills! The worst experience I ve ever had. Now I have to waste hours of my life sorting this out. DO NOT GO HERE. I figured the negative billing stories were flukes, but they re not.