I’m honestly so upset

I’m 21 YO M back in October I was having really bad panic attacks and it got to a point I was placed into intensive outpatient. I was there mon-fri for 2 weeks from 7am-4pm and they had me see a psychiatrist even though I wanted to work without medication. Anyway I was under the impression everything was covered by insurance…. And they told me that so I agreed. Well I just got a bill for 3k??? For the psych. wtf?? Because they declined it I guess. last time I needed an echo on my heart for my defect and I couldn’t even get it because insurance declined it.

I have ambetter and I believe it’s clear silver? Idk my mom helped me pick one out on the marketplace and she said it sucks really bad but it’s the best I can do. I’m just under a lot of medical bill stress. Including all the times I went to the er because of my anxiety I owe like 10-15k and I don’t know what to do.

Is there anyway I can contact my insurance and try to dispute something or tell them that I wasn’t aware of it?