Abusive parents blackmailing me

I ran away from my abusive and manipulative parents on my 18th birthday. I left them a note saying that I was leaving and not to seek me out. Before I left, I reset my computer and phone to factory settings. I’d made several social media accounts that my parents were unaware of, so I could talk to my boyfriend (who they didn’t know existed) and had used the accounts on both devices. I had also sent him a few naughty photos through these accounts through Facebook’s secret messages.

When I left, my parents called DHS and gave them my computer and phone to see what they could recover. They were able to recover enough to see the photos I sent.

Now my parents and I are communicating and they believe I’m being held against my will and I have told them countless times that I am not, and that I am incredibly happy with my new life. But they won’t give it up. They’ve threatened to take my boyfriend and I to court over the child pornography if I don’t communicate with them at least once a week and during the phone calls, I can’t evade their questions. Every time I talk to them, I have severe panic attacks during/after. I don’t want to have my parents in my life anymore, but I don’t want to fight my parents in court. I can’t get a restraining order because that will only tick them off more. Does anyone have any advise?

Edit: I live in Georgia and my parents live in Arkansas