Damn, I'm sorry to hear that. And thank you for the support while you were a member, I really appreciate it.
Have you tried appealing via
https://www.deviantart.com/contact-us?If you think it's mature content that you accidentally left outside of the paywall and/or was untagged mature content and/or was a celebrity and/or didn't have a "this is consensual fiction" warning it might be worth asking if they could let you know what the problem was so you can rebuild from scratch and make sure it doesn't happen again.
Genuinely don't know if that would work, but might be worth a try.