Can someone explain dMCA takedown on my original content?

I'm in a difficult situation and trying to figure out my next steps.

DMCA takedown on my original content. I've been dealing with this for about 16 weeks now and the situation isn't improving.

This involves content I created over the past 6 months. I do have documentation proving my ownership and timeline.

Has anyone been through something similar? What worked for you?

NAL, but from what I've read, you should file a complaint. Take the above with a huge disclaimer that I'm just some person on the internet.

Fair use is a defense, not a right. The four factors (purpose, nature, amount, market effect) are balanced on a case-by-case basis. Transformative use helps, but it doesn't guarantee fair use.