Regence won’t cover a service they referred me for

Hi everyone! A little backstory- During the beginning of the year I had Regence insurance through the marketplace. I had started dating someone new and decided I should get STD tested before we took our relationship to the next stage. There was a long wait to get an in person appointment so I looked through their website and found out I could do a virtual appointment through a platform called Doctors on Demand. I had the visit with the provider and she sent a lab order in for me to get tested at a Quest Diagnostic. After my visit with her I was billed my copay for the visit which was $50. I got tested that day and had to go back in for an additional test the next day (it was a test where I couldn’t go to the bathroom for two hours prior so that’s why I had to come again the next day). I got all my results back and everything was fine. Then a few weeks later I got a bill in the mail for $310 for the visit, and another one a few days after for $728. When I looked at the bill, it showed that regence did not cover any of the testing. I was really confused since I literally went through regence and the doctor specifically referred me to that clinic to get tested. I called regence and they were very confused as well because quest diagnostic is covered in my state. They looked into and realized that the online doctor I had the appointment with was licensed in Nevada (which is not where I live). They stated that since the doctor I talked to lived in Nevada that all the billing is processed through them. They are refusing to cover any of the labs I got tested for.

Does anyone have any advice on what to do in this situation?? I’ve been going back and forth with Regence on the phone and getting no solution for this. I really don’t think it makes sense for me to spend over $1,000 on getting tested when I had insurance that was supposed to cover it.