There is this person on Twitter going by the name of NFT thefts (@NFTtheft).
They have provided the public resourced to tackle any cases of art theft. For instance, OpenSea is using Google for image hosting, so anyone should try sending a DMCA notice to dmca-agent@google.com for "better results."
There are more resources anyone can use to stop this madness.
RazorXD
damn. this is shit. hope it gets taken down. unfortunately i can't help because i have a lack of knowledge in dmca. all i can do is support you in this though.